diff --git a/mozilla/htmlparser/src/nsLoggingSink.cpp b/mozilla/htmlparser/src/nsLoggingSink.cpp
index a8d5ca86c9b..2803f6474ef 100644
--- a/mozilla/htmlparser/src/nsLoggingSink.cpp
+++ b/mozilla/htmlparser/src/nsLoggingSink.cpp
@@ -510,15 +510,15 @@ nsLoggingSink::QuoteText(const nsString& aValue, nsString& aResult)
   while (cp < end) {
     PRUnichar ch = *cp++;
     if (ch == '"') {
-      aResult.Append("&quot;");
+      aResult.AppendWithConversion("&quot;");
     }
     else if (ch == '&') {
-      aResult.Append("&amp;");
+      aResult.AppendWithConversion("&amp;");
     }
     else if ((ch < 32) || (ch >= 127)) {
-      aResult.Append("&#");
-      aResult.Append(PRInt32(ch), 10);
-      aResult.Append(';');
+      aResult.AppendWithConversion("&#");
+      aResult.AppendWithConversion(PRInt32(ch), 10);
+      aResult.AppendWithConversion(';');
     }
     else {
       aResult.Append(ch);
diff --git a/mozilla/htmlparser/src/nsParser.cpp b/mozilla/htmlparser/src/nsParser.cpp
index 1f987bba792..e68f2867e98 100644
--- a/mozilla/htmlparser/src/nsParser.cpp
+++ b/mozilla/htmlparser/src/nsParser.cpp
@@ -194,8 +194,9 @@ void nsParser::FreeSharedObjects(void) {
  *  @param   
  *  @return   
  */
-nsParser::nsParser(nsITokenObserver* anObserver) : mUnusedInput("") , mCharset("ISO-8859-1") {
+nsParser::nsParser(nsITokenObserver* anObserver) {
   NS_INIT_REFCNT();
+  mCharset.AssignWithConversion("ISO-8859-1");
   mParserFilter = 0;
   mObserver = 0;
   mProgressEventSink = nsnull;
@@ -311,7 +312,7 @@ nsIParserFilter * nsParser::SetParserFilter(nsIParserFilter * aFilter)
  *  @return	 ptr to previously set contentsink (usually null)  
  */
 void nsParser::SetCommand(const char* aCommand){
-  nsAutoString theCommand(aCommand);
+  nsCAutoString theCommand(aCommand);
   if(theCommand.Equals(kViewSourceCommand))
     mCommand=eViewSource;
   else mCommand=eViewNormal;
@@ -872,7 +873,7 @@ nsresult nsParser::Parse(nsIURI* aURL,nsIStreamObserver* aListener,PRBool aVerif
     if (rv != NS_OK) {      
       return rv;
     }
-    nsAutoString theName(spec);
+    nsAutoString theName; theName.AssignWithConversion(spec);
     nsCRT::free(spec);
 
     nsScanner* theScanner=new nsScanner(theName,PR_FALSE,mCharset,mCharsetSource);
@@ -903,7 +904,7 @@ nsresult nsParser::Parse(nsIInputStream& aStream,const nsString& aMimeType,PRBoo
   nsresult  result=NS_ERROR_OUT_OF_MEMORY;
 
   //ok, time to create our tokenizer and begin the process
-  nsAutoString theUnknownFilename("unknown");
+  nsAutoString theUnknownFilename; theUnknownFilename.AssignWithConversion("unknown");
 
   nsInputStream input(&aStream);
     
@@ -1035,11 +1036,11 @@ PRBool nsParser::IsValidFragment(const nsString& aSourceBuffer,nsITagStack& aSta
   PRUint32 theCount=aStack.GetSize();
   PRUint32 theIndex=0;
   while(theIndex++<theCount){
-    theContext.Append("<");
+    theContext.AppendWithConversion("<");
     theContext.Append(aStack.TagAt(theCount-theIndex));
-    theContext.Append(">");
+    theContext.AppendWithConversion(">");
   }
-  theContext.Append("<endnote>");       //XXXHack! I'll make this better later.
+  theContext.AppendWithConversion("<endnote>");       //XXXHack! I'll make this better later.
   nsAutoString theBuffer(theContext);
   theBuffer.Append(aSourceBuffer);
   
@@ -1047,7 +1048,7 @@ PRBool nsParser::IsValidFragment(const nsString& aSourceBuffer,nsITagStack& aSta
   if(theBuffer.Length()){
     //now it's time to try to build the model from this fragment
 
-    nsString theOutput("");
+    nsString theOutput;
     nsIHTMLContentSink*  theSink=0;
     nsresult theResult=NS_New_HTML_ContentSinkStream(&theSink,&theOutput,0);
     SetContentSink(theSink);
@@ -1078,11 +1079,11 @@ nsresult nsParser::ParseFragment(const nsString& aSourceBuffer,void* aKey,nsITag
   PRUint32 theCount=aStack.GetSize();
   PRUint32 theIndex=0;
   while(theIndex++<theCount){
-    theContext.Append("<");
+    theContext.AppendWithConversion("<");
     theContext.Append(aStack.TagAt(theCount-theIndex));
-    theContext.Append(">");
+    theContext.AppendWithConversion(">");
   }
-  theContext.Append("<endnote>");       //XXXHack! I'll make this better later.
+  theContext.AppendWithConversion("<endnote>");       //XXXHack! I'll make this better later.
   nsAutoString theBuffer(theContext);
 
 #if 0
@@ -1386,7 +1387,7 @@ nsresult nsParser::OnStartRequest(nsIChannel* channel, nsISupports* aContext)
   rv = channel->GetContentType(&contentType);
   if (NS_SUCCEEDED(rv))
   {
-    mParserContext->SetMimeType(contentType);
+    mParserContext->SetMimeType( NS_ConvertToString(contentType) );
 	  nsCRT::free(contentType);
   }
   else
@@ -1409,7 +1410,7 @@ nsresult nsParser::OnStartRequest(nsIChannel* channel, nsISupports* aContext)
 
 static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsString& oCharset, nsCharsetSource& oCharsetSource) {
  oCharsetSource= kCharsetFromAutoDetection;
- oCharset = "";
+ oCharset.SetLength(0);
  // see http://www.w3.org/TR/1998/REC-xml-19980210#sec-oCharseting
  // for details
  switch(aBytes[0])
@@ -1419,19 +1420,19 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
         // 00 00
         if((0x00==aBytes[2]) && (0x3C==aBytes[3])) {
            // 00 00 00 3C UCS-4, big-endian machine (1234 order)
-           oCharset = UCS4_BE;
+           oCharset.AssignWithConversion(UCS4_BE);
         } else if((0x3C==aBytes[2]) && (0x00==aBytes[3])) {
            // 00 00 3C 00 UCS-4, unusual octet order (2143)
-           oCharset = UCS4_2143;
+           oCharset.AssignWithConversion(UCS4_2143);
         } 
      } else if(0x3C==aBytes[1]) {
         // 00 3C
         if((0x00==aBytes[2]) && (0x00==aBytes[3])) {
            // 00 3C 00 00 UCS-4, unusual octet order (3412)
-           oCharset = UCS4_3412;
+           oCharset.AssignWithConversion(UCS4_3412);
         } else if((0x3C==aBytes[2]) && (0x3F==aBytes[3])) {
            // 00 3C 00 3F UTF-16, big-endian, no Byte Order Mark
-           oCharset = UCS2_BE; // should change to UTF-16BE
+           oCharset.AssignWithConversion(UCS2_BE); // should change to UTF-16BE
         } 
      }
    break;
@@ -1440,17 +1441,17 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
         // 3C 00
         if((0x00==aBytes[2]) && (0x00==aBytes[3])) {
            // 3C 00 00 00 UCS-4, little-endian machine (4321 order)
-           oCharset = UCS4_LE;
+           oCharset.AssignWithConversion(UCS4_LE);
         } else if((0x3F==aBytes[2]) && (0x00==aBytes[3])) {
            // 3C 00 3F 00 UTF-16, little-endian, no Byte Order Mark
-           oCharset = UCS2_LE; // should change to UTF-16LE
+           oCharset.AssignWithConversion(UCS2_LE); // should change to UTF-16LE
         } 
      } else if((0x3C==aBytes[0]) && (0x3F==aBytes[1]) &&
                (0x78==aBytes[2]) && (0x6D==aBytes[3]) &&
                (0 == PL_strncmp("<?xml version", (char*)aBytes, 13 ))) {
        // 3C 3F 78 6D
-       nsAutoString firstXbytes("");
-       firstXbytes.Append((const char*)aBytes, (PRInt32)
+       nsAutoString firstXbytes;
+       firstXbytes.AppendWithConversion((const char*)aBytes, (PRInt32)
                        ((aLen > XMLENCODING_PEEKBYTES)?
                        XMLENCODING_PEEKBYTES:
                        aLen)); 
@@ -1481,7 +1482,7 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
      if(0xFF==aBytes[1]) {
         // FE FF
         // UTF-16, big-endian 
-        oCharset = UCS2_BE; // should change to UTF-16BE
+        oCharset.AssignWithConversion(UCS2_BE); // should change to UTF-16BE
         oCharsetSource= kCharsetFromByteOrderMark;
      }
    break;
@@ -1489,7 +1490,7 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
      if(0xFE==aBytes[1]) {
         // FF FE
         // UTF-16, little-endian 
-        oCharset = UCS2_LE; // should change to UTF-16LE
+        oCharset.AssignWithConversion(UCS2_LE); // should change to UTF-16LE
         oCharsetSource= kCharsetFromByteOrderMark;
      }
    break;
@@ -1565,7 +1566,7 @@ theContext->mTransferBufferSize;
         if(NS_SUCCEEDED(result) && (theNumRead>0)) { 
           if(needCheckFirst4Bytes && (theNumRead >= 4)) { 
              nsCharsetSource guessSource; 
-             nsAutoString guess(""); 
+             nsAutoString guess; 
   
              needCheckFirst4Bytes = PR_FALSE; 
              if(detectByteOrderMark((const unsigned char*)theContext->mTransferBuffer, 
@@ -1639,7 +1640,7 @@ nsresult nsParser::OnStopRequest(nsIChannel* channel, nsISupports* aContext,
     //If you're here, then OnDataAvailable() never got called. 
     //Prior to necko, we never dealt with this case, but the problem may have existed.
     //What we'll do (for now at least) is construct a blank HTML document.
-    nsAutoString  temp("<html><body></body></html>");
+    nsAutoString  temp; temp.AssignWithConversion("<html><body></body></html>");
     mParserContext->mScanner->Append(temp);
     result=ResumeParse(PR_TRUE,PR_TRUE);    
   }
diff --git a/mozilla/htmlparser/src/nsParserModule.cpp b/mozilla/htmlparser/src/nsParserModule.cpp
index 73e4f21a4de..5812d390f8d 100644
--- a/mozilla/htmlparser/src/nsParserModule.cpp
+++ b/mozilla/htmlparser/src/nsParserModule.cpp
@@ -78,7 +78,7 @@ nsParserService::HTMLStringTagToId(const nsString &aTag, PRInt32* aId) const
 NS_IMETHODIMP 
 nsParserService::HTMLIdToStringTag(PRInt32 aId, nsString& aTag) const
 {
-  aTag = nsHTMLTags::GetStringValue((nsHTMLTag)aId);
+  aTag.AssignWithConversion( nsHTMLTags::GetStringValue((nsHTMLTag)aId) );
   return NS_OK;
 }
   
diff --git a/mozilla/htmlparser/src/nsParserNode.cpp b/mozilla/htmlparser/src/nsParserNode.cpp
index b92349e5a3f..747bcf36809 100644
--- a/mozilla/htmlparser/src/nsParserNode.cpp
+++ b/mozilla/htmlparser/src/nsParserNode.cpp
@@ -35,7 +35,7 @@ static NS_DEFINE_IID(kIParserNodeIID, NS_IPARSER_NODE_IID);
 nsString& GetEmptyString() {
   static nsString* gEmptyStr=0;
   if(!gEmptyStr)
-    gEmptyStr=new nsString("");
+    gEmptyStr=new nsString;
   return *gEmptyStr;
 }
 
diff --git a/mozilla/htmlparser/src/nsScanner.cpp b/mozilla/htmlparser/src/nsScanner.cpp
index 34ac6a43252..04b48fc9d54 100644
--- a/mozilla/htmlparser/src/nsScanner.cpp
+++ b/mozilla/htmlparser/src/nsScanner.cpp
@@ -53,7 +53,7 @@ MOZ_DECL_CTOR_COUNTER(nsScanner);
  *  @return  
  */
 nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharsetSource aSource) : 
-  mBuffer(anHTMLString), mFilename(""), mUnicodeXferBuf("")
+  mBuffer(anHTMLString)
 {
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -64,7 +64,6 @@ nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharset
   mMarkPos=0;
   mInputStream=0;
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -80,7 +79,7 @@ nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharset
  *  @return  
  */
 nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& aCharset, nsCharsetSource aSource) : 
-    mBuffer(""), mFilename(aFilename), mUnicodeXferBuf("")
+    mFilename(aFilename)
 {
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -94,7 +93,6 @@ nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& a
 		mInputStream = new nsInputFileStream(nsFileSpec(aFilename));
   } //if
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -110,7 +108,7 @@ nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& a
  *  @return  
  */
 nsScanner::nsScanner(nsString& aFilename,nsInputStream& aStream,const nsString& aCharset, nsCharsetSource aSource) :
-    mBuffer(""), mFilename(aFilename) , mUnicodeXferBuf("")
+    mFilename(aFilename)
 {  
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -121,7 +119,6 @@ nsScanner::nsScanner(nsString& aFilename,nsInputStream& aStream,const nsString&
   mOwnsStream=PR_FALSE;
   mInputStream=&aStream;
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -152,7 +149,7 @@ nsresult nsScanner::SetDocumentCharset(const nsString& aCharset , nsCharsetSourc
     if(NS_FAILED(res) && (kCharsetUninitialized == mCharsetSource) )
     {
        // failed - unknown alias , fallback to ISO-8859-1
-      charsetName = "ISO-8859-1";
+      charsetName.AssignWithConversion("ISO-8859-1");
     }
     mCharset = charsetName;
     mCharsetSource = aSource;
@@ -241,10 +238,8 @@ PRUint32 nsScanner::Mark(PRInt32 anIndex){
  */
 PRBool nsScanner::Insert(const nsString& aBuffer) {
 
-  PRInt32 theLen=aBuffer.Length();
-
-  mBuffer.Insert(aBuffer,mOffset,theLen);
-  mTotalRead+=theLen;
+  mBuffer.Insert(aBuffer,mOffset);
+  mTotalRead+=aBuffer.Length();
   return PR_TRUE;
 }
 
@@ -317,7 +312,7 @@ PRBool nsScanner::Append(const char* aBuffer, PRUint32 aLen){
 	  // delete[] unichars;
   }
   else {
-    mBuffer.Append(aBuffer,aLen);
+    mBuffer.AppendWithConversion(aBuffer,aLen);
     mTotalRead+=aLen;
 
   }
@@ -394,7 +389,7 @@ nsresult nsScanner::FillBuffer(void) {
     }
     mOffset=mBuffer.Length();
     if((0<numread) && (0==result)) {
-      mBuffer.Append((const char*)buf,numread);
+      mBuffer.AppendWithConversion((const char*)buf,numread);
       mBuffer.StripChar(0);  //yank the nulls that come in from the net.
     }
     mTotalRead+=mBuffer.Length();
diff --git a/mozilla/htmlparser/src/nsTagHandler.h b/mozilla/htmlparser/src/nsTagHandler.h
index b2e21b16dca..6d8aaa0feaf 100644
--- a/mozilla/htmlparser/src/nsTagHandler.h
+++ b/mozilla/htmlparser/src/nsTagHandler.h
@@ -63,7 +63,7 @@ public:
    * @param aTheString -- The string (tag) associated with this handler
    * @return VOID
    */
-  void SetString(const nsString &aTheString) {mTheTagName = aTheString;}
+  void SetString(const nsString &aTheString) {mTheTagName.Assign(aTheString);}
 
   /**
    * Returns the string (tag) handled by this nsTagHandler
diff --git a/mozilla/htmlparser/src/nsToken.cpp b/mozilla/htmlparser/src/nsToken.cpp
index 3e1b2a90872..884a277cafd 100644
--- a/mozilla/htmlparser/src/nsToken.cpp
+++ b/mozilla/htmlparser/src/nsToken.cpp
@@ -72,8 +72,9 @@ CToken::CToken(const nsString& aName) : mTextValue(aName) {
  *  @update gess 3/25/98
  *  @param  aName--char* containing name of token
  */
-CToken::CToken(const char* aName) : mTextValue(aName) {
+CToken::CToken(const char* aName) {
   MOZ_COUNT_CTOR(CToken);
+  mTextValue.AssignWithConversion(aName);
   mTypeID=0;
   mAttrCount=0;
   TokenCount++;
@@ -164,7 +165,7 @@ void CToken::DebugDumpSource(nsOutputStream& anOutputStream) {
  * @param   name is a char* value containing new string value
  */
 void CToken::SetStringValue(const char* name){
-  mTextValue=name;
+  mTextValue.AssignWithConversion(name);
 }
 
 /**
diff --git a/mozilla/htmlparser/src/nsViewSourceHTML.cpp b/mozilla/htmlparser/src/nsViewSourceHTML.cpp
index f9d3ce348a2..d39081e4e2b 100644
--- a/mozilla/htmlparser/src/nsViewSourceHTML.cpp
+++ b/mozilla/htmlparser/src/nsViewSourceHTML.cpp
@@ -202,12 +202,21 @@ public:
  *  @param   
  *  @return  
  */
-CViewSourceHTML::CViewSourceHTML() : nsIDTD(), 
-  mStartTag("start"), mEndTag("end"), mCommentTag("comment"), 
-  mCDATATag("cdata"), mDocTypeTag("doctype"), mPITag("pi"), 
-  mEntityTag("entity"), mText("txt"), mKey("key"), mValue("val")
+CViewSourceHTML::CViewSourceHTML()
 {
   NS_INIT_REFCNT();
+
+  mStartTag.AssignWithConversion("start");
+  mEndTag.AssignWithConversion("end");
+  mCommentTag.AssignWithConversion("comment");
+  mCDATATag.AssignWithConversion("cdata");
+  mDocTypeTag.AssignWithConversion("doctype");
+  mPITag.AssignWithConversion("pi");
+  mEntityTag.AssignWithConversion("entity");
+  mText.AssignWithConversion("txt");
+  mKey.AssignWithConversion("key");
+  mValue.AssignWithConversion("val");
+
   mParser=0;
   mSink=0;
   mLineNumber=0;
@@ -269,15 +278,15 @@ nsresult CViewSourceHTML::CreateNewInstance(nsIDTD** aInstancePtrResult){
 eAutoDetectResult CViewSourceHTML::CanParse(CParserContext& aParserContext,nsString& aBuffer, PRInt32 aVersion) {
   eAutoDetectResult result=eUnknownDetect;
 
-  if(aParserContext.mMimeType.Equals(kPlainTextContentType) ||
-     aParserContext.mMimeType.Equals(kTextCSSContentType)) {
+  if(aParserContext.mMimeType.EqualsWithConversion(kPlainTextContentType) ||
+     aParserContext.mMimeType.EqualsWithConversion(kTextCSSContentType)) {
     result=eValidDetect;
   }
   else if(eViewSource==aParserContext.mParserCommand) {
-    if(aParserContext.mMimeType.Equals(kXMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kRDFTextContentType) ||
-       aParserContext.mMimeType.Equals(kHTMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kXULTextContentType)) {
+    if(aParserContext.mMimeType.EqualsWithConversion(kXMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kRDFTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kHTMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kXULTextContentType)) {
       result=ePrimaryDetect;
     }
   }
@@ -327,7 +336,7 @@ nsresult CViewSourceHTML::WillBuildModel(  const CParserContext& aParserContext,
     CToken theToken("viewsource");
     nsCParserNode theNode(&theToken,0);
 
-    CAttributeToken *theAttr=new CAttributeToken("xmlns","http://www.mozilla.org/viewsource");
+    CAttributeToken *theAttr=new CAttributeToken(NS_ConvertToString("xmlns"), NS_ConvertToString("http://www.mozilla.org/viewsource"));
     if(theAttr)
       theNode.AddAttribute(theAttr);
     mSink->OpenContainer(theNode);
@@ -664,7 +673,7 @@ nsresult WriteText(const nsString& aTextString,nsIContentSink& aSink,PRBool aPre
     }
     if(0<theSpaces){
 
-      CEntityToken theToken("nbsp");
+      CEntityToken theToken( NS_ConvertToString("nbsp") );
       aContext.mStartNode.Init(&theToken);
       int theIndex;
       for(theIndex=0;theIndex<theSpaces;theIndex++)
@@ -748,7 +757,7 @@ nsresult CViewSourceHTML::WriteAttributes(PRInt32 attrCount) {
  *  @return  result status
  */
 nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,CToken* aToken,PRInt32 attrCount,PRBool aNewlineRequired) {
-  static nsString       theString("");
+  static nsString       theString;
 
   nsresult result=NS_OK;
 
@@ -811,7 +820,7 @@ nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,CToken* aToken,PRInt3
  *  @return  result status
  */
 nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,nsString & aText,PRInt32 attrCount,PRBool aNewlineRequired) {
-  static nsString       theString("");
+  static nsString       theString;
 
   nsresult result=NS_OK;
 
@@ -893,7 +902,7 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
           void*             theDocID=(pc)? pc->mKey:0; 
           eHTMLTags         theTag=(eHTMLTags)theToken->GetTypeID();  
 
-          result=theService->Notify(theTag,theContext.mTokenNode,(PRUint32)theDocID,kViewSourceCommand,mParser);
+          result=theService->Notify(theTag,theContext.mTokenNode,(PRUint32)theDocID, NS_ConvertToString(kViewSourceCommand), mParser);
         }
       }
       theContext.mTokenNode.Init(0,0,gTokenRecycler);  //now recycle.
@@ -906,8 +915,8 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
     case eToken_cdatasection:
       {
         nsString& theStr=aToken->GetStringValueXXX();
-        theStr.Insert("<!",0);
-        theStr.Append("]]>");
+        theStr.InsertWithConversion("<!",0);
+        theStr.AppendWithConversion("]]>");
         result=WriteTag(mCDATATag,aToken,0,PR_TRUE);
       }
       break;
@@ -933,10 +942,10 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
       {
         nsAutoString theStr;
         nsString& theEntity=aToken->GetStringValueXXX();
-        if(!theEntity.Equals("XI",IGNORE_CASE)) {
+        if(!theEntity.EqualsWithConversion("XI",IGNORE_CASE)) {
           PRUnichar theChar=theEntity.CharAt(0);
           if((nsCRT::IsAsciiDigit(theChar)) || ('X'==theChar) || ('x'==theChar)){
-            theStr.Append("#");
+            theStr.AppendWithConversion("#");
           }
           theStr.Append(theEntity);
         }
diff --git a/mozilla/htmlparser/src/nsWellFormedDTD.cpp b/mozilla/htmlparser/src/nsWellFormedDTD.cpp
index 59feff06562..88961eaf146 100644
--- a/mozilla/htmlparser/src/nsWellFormedDTD.cpp
+++ b/mozilla/htmlparser/src/nsWellFormedDTD.cpp
@@ -122,7 +122,7 @@ NS_IMPL_RELEASE(CWellFormedDTD)
  *  @param   
  *  @return  
  */
-CWellFormedDTD::CWellFormedDTD() : nsIDTD(), mFilename("") {
+CWellFormedDTD::CWellFormedDTD() : nsIDTD() {
   NS_INIT_REFCNT();
   mParser=0;
   mSink=0;
@@ -177,15 +177,15 @@ eAutoDetectResult CWellFormedDTD::CanParse(CParserContext& aParserContext,nsStri
   eAutoDetectResult result=eUnknownDetect;
 
   if(eViewSource!=aParserContext.mParserCommand) {
-    if(aParserContext.mMimeType.Equals(kXMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kRDFTextContentType) ||
-       aParserContext.mMimeType.Equals(kXULTextContentType)) {
+    if(aParserContext.mMimeType.EqualsWithConversion(kXMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kRDFTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kXULTextContentType)) {
       result=ePrimaryDetect;
     }
     else {
       if(-1<aBuffer.Find("<?xml ")) {
         if(0==aParserContext.mMimeType.Length()) {
-          aParserContext.SetMimeType(kXMLTextContentType);
+          aParserContext.SetMimeType( NS_ConvertToString(kXMLTextContentType) );
         }
         result=eValidDetect;
       }
diff --git a/mozilla/htmlparser/src/nsXIFDTD.cpp b/mozilla/htmlparser/src/nsXIFDTD.cpp
index 397751ab802..c35ec714f3b 100644
--- a/mozilla/htmlparser/src/nsXIFDTD.cpp
+++ b/mozilla/htmlparser/src/nsXIFDTD.cpp
@@ -174,7 +174,7 @@ eXIFTags DetermineXIFTagType(const nsString& aString)
   
   while(low<=high){
     middle=(PRInt32)(low+high)/2;
-    result=aString.Compare(gXIFTagTable[middle].mName, PR_TRUE); 
+    result=aString.CompareWithConversion(gXIFTagTable[middle].mName, PR_TRUE); 
     if (result==0)
       return gXIFTagTable[middle].fTagID; 
     if (result<0)
@@ -251,7 +251,7 @@ nsXIFDTD::nsXIFDTD() : nsIDTD(){
   mInContent=PR_FALSE;
   mLowerCaseAttributes=PR_TRUE;
   mLowerCaseTags=PR_TRUE;
-  mCharset = "";
+  mCharset.SetLength(0);
   mSink=0;
 }
 
@@ -303,18 +303,18 @@ nsresult nsXIFDTD::CreateNewInstance(nsIDTD** aInstancePtrResult){
 eAutoDetectResult nsXIFDTD::CanParse(CParserContext& aParserContext,nsString& aBuffer, PRInt32 aVersion) {
   eAutoDetectResult result=eUnknownDetect;
 
-  if(aParserContext.mMimeType.Equals(kXIFTextContentType)){
+  if(aParserContext.mMimeType.EqualsWithConversion(kXIFTextContentType)){
     result=ePrimaryDetect;
   }
   else 
   {
     if(kNotFound!=aBuffer.Find(kXIFDocHeader)) {
-      aParserContext.SetMimeType(kXIFTextContentType);
+      aParserContext.SetMimeType( NS_ConvertToString(kXIFTextContentType) );
       result=ePrimaryDetect;
     }
   }
   
-  nsString charset("ISO-8859-1");
+  nsString charset; charset.AssignWithConversion("ISO-8859-1");
   PRInt32 offset;
   offset = aBuffer.Find(kXIFDocInfo);
 
@@ -534,7 +534,7 @@ nsresult nsXIFDTD::HandleTextToken(CToken* aToken) {
   {
     nsString& temp = aToken->GetStringValueXXX();
 
-    if (!temp.Equals("<xml version=\"1.0\"?>"))
+    if (!temp.EqualsWithConversion("<xml version=\"1.0\"?>"))
     {
       result= AddLeaf(node);
     }
@@ -872,9 +872,9 @@ PRBool nsXIFDTD::GetAttributePair(nsIParserNode& aNode, nsString& aKey, nsString
     key.StripChars(quote);
     value.StripChars(quote);
 
-    if (key.Equals("name"))
+    if (key.EqualsWithConversion("name"))
       aKey = value;
-    if (key.Equals("value"))
+    if (key.EqualsWithConversion("value"))
     {
       aValue = value;
       hasValue = PR_TRUE;
@@ -901,12 +901,12 @@ eHTMLTags nsXIFDTD::GetStartTag(const nsIParserNode& aNode, nsString& aName)
   {
     case eXIFTag_container:
     case eXIFTag_leaf:
-      if (GetAttribute(aNode,nsString("isa"),aName))
+      if (GetAttribute(aNode,NS_ConvertToString("isa"),aName))
         tag = tag = nsHTMLTags::LookupTag(aName);
     break;
 
     case eXIFTag_css_stylesheet:
-      aName = "style";
+      aName.AssignWithConversion("style");
       tag = nsHTMLTags::LookupTag(aName);
     break;  
 
@@ -1299,7 +1299,7 @@ nsresult nsXIFDTD::CollectContentComment(CToken* aToken, nsCParserNode& aNode) {
       PRBool       done=PR_FALSE;
       PRBool       inContent=PR_FALSE;
       nsString&    comment=aToken->GetStringValueXXX(); 
-      comment="<!--"; // overwrite comment with "<!--"
+      comment.AssignWithConversion("<!--"); // overwrite comment with "<!--"
       while (!done && NS_SUCCEEDED(result))
       {
         token=mTokenizer->PopToken();
@@ -1307,14 +1307,14 @@ nsresult nsXIFDTD::CollectContentComment(CToken* aToken, nsCParserNode& aNode) {
         if(!token) return result;
 
         type=(eHTMLTokenTypes)token->GetTokenType();
-        fragment=token->GetStringValueXXX();
-        if(fragment.Equals("content")) {
+        fragment.Assign(token->GetStringValueXXX());
+        if(fragment.EqualsWithConversion("content")) {
           if(type==eToken_start) 
             inContent=PR_TRUE;
           else inContent=PR_FALSE;
         }
-        else if(fragment.Equals("comment")) {
-          comment.Append("-->");
+        else if(fragment.EqualsWithConversion("comment")) {
+          comment.AppendWithConversion("-->");
           result=(mSink)? mSink->AddComment(aNode):NS_OK;
           done=PR_TRUE;
         }
@@ -1414,7 +1414,7 @@ void nsXIFDTD::ProcessEncodeTag(const nsIParserNode& aNode)
   nsString value;
   PRInt32  error;
 
-  if (GetAttribute(aNode,nsString("selection"),value))
+  if (GetAttribute(aNode,NS_ConvertToString("selection"),value))
   {
     PRInt32 temp = value.ToInteger(&error);
     if (temp == 1)
@@ -1431,7 +1431,7 @@ void nsXIFDTD::ProcessEntityTag(const nsIParserNode& aNode)
 {
   nsAutoString value;
 
-  if (GetAttribute(aNode,nsString("value"),value)) {
+  if (GetAttribute(aNode,NS_ConvertToString("value"),value)) {
     value+=';';
     CEntityToken* entity = new CEntityToken(value);
     nsCParserNode node((CToken*)entity);
@@ -1448,7 +1448,7 @@ void nsXIFDTD::BeginCSSStyleSheet(const nsIParserNode& aNode)
 
   mBuffer.Truncate(0);
   mMaxCSSSelectorWidth = 10;
-  if (GetAttribute(aNode,nsString("max_css_selector_width"),value))
+  if (GetAttribute(aNode,NS_ConvertToString("max_css_selector_width"),value))
   {
     PRInt32 temp = value.ToInteger(&error);
     if (error == NS_OK)
@@ -1470,9 +1470,9 @@ void nsXIFDTD::EndCSSStyleSheet(const nsIParserNode& aNode)
   CStartToken   startToken(tagName);
   nsCParserNode startNode((CToken*)&startToken);
 
-  mBuffer.Append("</");
+  mBuffer.AppendWithConversion("</");
   mBuffer.Append(tagName);
-  mBuffer.Append(">");
+  mBuffer.AppendWithConversion(">");
   startNode.SetSkippedContent(mBuffer);
   mSink->AddLeaf(startNode);
 
@@ -1494,7 +1494,7 @@ void nsXIFDTD::AddCSSSelector(const nsIParserNode& aNode)
 {
   nsString value;
 
-  if (GetAttribute(aNode, nsString("selectors"), value))
+  if (GetAttribute(aNode, NS_ConvertToString("selectors"), value))
   {
     if (mLowerCaseAttributes == PR_TRUE)
       value.ToLowerCase();
@@ -1517,16 +1517,16 @@ void nsXIFDTD::BeginCSSDeclarationList(const nsIParserNode& aNode)
     count = 0;
 
   for (PRInt32 i = 0; i < count; i++)
-    mBuffer.Append(" ");
+    mBuffer.AppendWithConversion(" ");
 
-  mBuffer.Append("   {");
+  mBuffer.AppendWithConversion("   {");
   mCSSDeclarationCount = 0;
 
 }
 
 void nsXIFDTD::EndCSSDeclarationList(const nsIParserNode& aNode)
 {
-  mBuffer.Append("}\n");
+  mBuffer.AppendWithConversion("}\n");
 }
 
 
@@ -1536,14 +1536,14 @@ void nsXIFDTD::AddCSSDeclaration(const nsIParserNode& aNode)
   nsString value;
 
 
-  if (PR_TRUE == GetAttribute(aNode, nsString("property"), property))
-    if (PR_TRUE == GetAttribute(aNode, nsString("value"), value))
+  if (PR_TRUE == GetAttribute(aNode, NS_ConvertToString("property"), property))
+    if (PR_TRUE == GetAttribute(aNode, NS_ConvertToString("value"), value))
     {
       if (mCSSDeclarationCount != 0)
-        mBuffer.Append(";");
-      mBuffer.Append(" ");
+        mBuffer.AppendWithConversion(";");
+      mBuffer.AppendWithConversion(" ");
       mBuffer.Append(property);
-      mBuffer.Append(": ");
+      mBuffer.AppendWithConversion(": ");
       mBuffer.Append(value);
       mCSSDeclarationCount++;
     }
diff --git a/mozilla/htmlparser/src/nsXMLTokenizer.cpp b/mozilla/htmlparser/src/nsXMLTokenizer.cpp
index 12368e2ebb9..7cb88064a60 100644
--- a/mozilla/htmlparser/src/nsXMLTokenizer.cpp
+++ b/mozilla/htmlparser/src/nsXMLTokenizer.cpp
@@ -237,7 +237,7 @@ nsresult nsXMLTokenizer::ConsumeSpecialMarkup(PRUnichar aChar,CToken*& aToken,ns
     PRBool isComment=PR_TRUE; 
     nsAutoString  theEmpty;
     if(theChar==kLeftSquareBracket) {
-      nsAutoString CDATAString("[CDATA[");
+      nsAutoString CDATAString; CDATAString.AssignWithConversion("[CDATA[");
       PRBool isCDATA = PR_FALSE;
       result = ConsumeConditional(aScanner, CDATAString, isCDATA);
       if (NS_OK == result) {
diff --git a/mozilla/parser/htmlparser/src/nsLoggingSink.cpp b/mozilla/parser/htmlparser/src/nsLoggingSink.cpp
index a8d5ca86c9b..2803f6474ef 100644
--- a/mozilla/parser/htmlparser/src/nsLoggingSink.cpp
+++ b/mozilla/parser/htmlparser/src/nsLoggingSink.cpp
@@ -510,15 +510,15 @@ nsLoggingSink::QuoteText(const nsString& aValue, nsString& aResult)
   while (cp < end) {
     PRUnichar ch = *cp++;
     if (ch == '"') {
-      aResult.Append("&quot;");
+      aResult.AppendWithConversion("&quot;");
     }
     else if (ch == '&') {
-      aResult.Append("&amp;");
+      aResult.AppendWithConversion("&amp;");
     }
     else if ((ch < 32) || (ch >= 127)) {
-      aResult.Append("&#");
-      aResult.Append(PRInt32(ch), 10);
-      aResult.Append(';');
+      aResult.AppendWithConversion("&#");
+      aResult.AppendWithConversion(PRInt32(ch), 10);
+      aResult.AppendWithConversion(';');
     }
     else {
       aResult.Append(ch);
diff --git a/mozilla/parser/htmlparser/src/nsParser.cpp b/mozilla/parser/htmlparser/src/nsParser.cpp
index 1f987bba792..e68f2867e98 100644
--- a/mozilla/parser/htmlparser/src/nsParser.cpp
+++ b/mozilla/parser/htmlparser/src/nsParser.cpp
@@ -194,8 +194,9 @@ void nsParser::FreeSharedObjects(void) {
  *  @param   
  *  @return   
  */
-nsParser::nsParser(nsITokenObserver* anObserver) : mUnusedInput("") , mCharset("ISO-8859-1") {
+nsParser::nsParser(nsITokenObserver* anObserver) {
   NS_INIT_REFCNT();
+  mCharset.AssignWithConversion("ISO-8859-1");
   mParserFilter = 0;
   mObserver = 0;
   mProgressEventSink = nsnull;
@@ -311,7 +312,7 @@ nsIParserFilter * nsParser::SetParserFilter(nsIParserFilter * aFilter)
  *  @return	 ptr to previously set contentsink (usually null)  
  */
 void nsParser::SetCommand(const char* aCommand){
-  nsAutoString theCommand(aCommand);
+  nsCAutoString theCommand(aCommand);
   if(theCommand.Equals(kViewSourceCommand))
     mCommand=eViewSource;
   else mCommand=eViewNormal;
@@ -872,7 +873,7 @@ nsresult nsParser::Parse(nsIURI* aURL,nsIStreamObserver* aListener,PRBool aVerif
     if (rv != NS_OK) {      
       return rv;
     }
-    nsAutoString theName(spec);
+    nsAutoString theName; theName.AssignWithConversion(spec);
     nsCRT::free(spec);
 
     nsScanner* theScanner=new nsScanner(theName,PR_FALSE,mCharset,mCharsetSource);
@@ -903,7 +904,7 @@ nsresult nsParser::Parse(nsIInputStream& aStream,const nsString& aMimeType,PRBoo
   nsresult  result=NS_ERROR_OUT_OF_MEMORY;
 
   //ok, time to create our tokenizer and begin the process
-  nsAutoString theUnknownFilename("unknown");
+  nsAutoString theUnknownFilename; theUnknownFilename.AssignWithConversion("unknown");
 
   nsInputStream input(&aStream);
     
@@ -1035,11 +1036,11 @@ PRBool nsParser::IsValidFragment(const nsString& aSourceBuffer,nsITagStack& aSta
   PRUint32 theCount=aStack.GetSize();
   PRUint32 theIndex=0;
   while(theIndex++<theCount){
-    theContext.Append("<");
+    theContext.AppendWithConversion("<");
     theContext.Append(aStack.TagAt(theCount-theIndex));
-    theContext.Append(">");
+    theContext.AppendWithConversion(">");
   }
-  theContext.Append("<endnote>");       //XXXHack! I'll make this better later.
+  theContext.AppendWithConversion("<endnote>");       //XXXHack! I'll make this better later.
   nsAutoString theBuffer(theContext);
   theBuffer.Append(aSourceBuffer);
   
@@ -1047,7 +1048,7 @@ PRBool nsParser::IsValidFragment(const nsString& aSourceBuffer,nsITagStack& aSta
   if(theBuffer.Length()){
     //now it's time to try to build the model from this fragment
 
-    nsString theOutput("");
+    nsString theOutput;
     nsIHTMLContentSink*  theSink=0;
     nsresult theResult=NS_New_HTML_ContentSinkStream(&theSink,&theOutput,0);
     SetContentSink(theSink);
@@ -1078,11 +1079,11 @@ nsresult nsParser::ParseFragment(const nsString& aSourceBuffer,void* aKey,nsITag
   PRUint32 theCount=aStack.GetSize();
   PRUint32 theIndex=0;
   while(theIndex++<theCount){
-    theContext.Append("<");
+    theContext.AppendWithConversion("<");
     theContext.Append(aStack.TagAt(theCount-theIndex));
-    theContext.Append(">");
+    theContext.AppendWithConversion(">");
   }
-  theContext.Append("<endnote>");       //XXXHack! I'll make this better later.
+  theContext.AppendWithConversion("<endnote>");       //XXXHack! I'll make this better later.
   nsAutoString theBuffer(theContext);
 
 #if 0
@@ -1386,7 +1387,7 @@ nsresult nsParser::OnStartRequest(nsIChannel* channel, nsISupports* aContext)
   rv = channel->GetContentType(&contentType);
   if (NS_SUCCEEDED(rv))
   {
-    mParserContext->SetMimeType(contentType);
+    mParserContext->SetMimeType( NS_ConvertToString(contentType) );
 	  nsCRT::free(contentType);
   }
   else
@@ -1409,7 +1410,7 @@ nsresult nsParser::OnStartRequest(nsIChannel* channel, nsISupports* aContext)
 
 static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsString& oCharset, nsCharsetSource& oCharsetSource) {
  oCharsetSource= kCharsetFromAutoDetection;
- oCharset = "";
+ oCharset.SetLength(0);
  // see http://www.w3.org/TR/1998/REC-xml-19980210#sec-oCharseting
  // for details
  switch(aBytes[0])
@@ -1419,19 +1420,19 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
         // 00 00
         if((0x00==aBytes[2]) && (0x3C==aBytes[3])) {
            // 00 00 00 3C UCS-4, big-endian machine (1234 order)
-           oCharset = UCS4_BE;
+           oCharset.AssignWithConversion(UCS4_BE);
         } else if((0x3C==aBytes[2]) && (0x00==aBytes[3])) {
            // 00 00 3C 00 UCS-4, unusual octet order (2143)
-           oCharset = UCS4_2143;
+           oCharset.AssignWithConversion(UCS4_2143);
         } 
      } else if(0x3C==aBytes[1]) {
         // 00 3C
         if((0x00==aBytes[2]) && (0x00==aBytes[3])) {
            // 00 3C 00 00 UCS-4, unusual octet order (3412)
-           oCharset = UCS4_3412;
+           oCharset.AssignWithConversion(UCS4_3412);
         } else if((0x3C==aBytes[2]) && (0x3F==aBytes[3])) {
            // 00 3C 00 3F UTF-16, big-endian, no Byte Order Mark
-           oCharset = UCS2_BE; // should change to UTF-16BE
+           oCharset.AssignWithConversion(UCS2_BE); // should change to UTF-16BE
         } 
      }
    break;
@@ -1440,17 +1441,17 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
         // 3C 00
         if((0x00==aBytes[2]) && (0x00==aBytes[3])) {
            // 3C 00 00 00 UCS-4, little-endian machine (4321 order)
-           oCharset = UCS4_LE;
+           oCharset.AssignWithConversion(UCS4_LE);
         } else if((0x3F==aBytes[2]) && (0x00==aBytes[3])) {
            // 3C 00 3F 00 UTF-16, little-endian, no Byte Order Mark
-           oCharset = UCS2_LE; // should change to UTF-16LE
+           oCharset.AssignWithConversion(UCS2_LE); // should change to UTF-16LE
         } 
      } else if((0x3C==aBytes[0]) && (0x3F==aBytes[1]) &&
                (0x78==aBytes[2]) && (0x6D==aBytes[3]) &&
                (0 == PL_strncmp("<?xml version", (char*)aBytes, 13 ))) {
        // 3C 3F 78 6D
-       nsAutoString firstXbytes("");
-       firstXbytes.Append((const char*)aBytes, (PRInt32)
+       nsAutoString firstXbytes;
+       firstXbytes.AppendWithConversion((const char*)aBytes, (PRInt32)
                        ((aLen > XMLENCODING_PEEKBYTES)?
                        XMLENCODING_PEEKBYTES:
                        aLen)); 
@@ -1481,7 +1482,7 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
      if(0xFF==aBytes[1]) {
         // FE FF
         // UTF-16, big-endian 
-        oCharset = UCS2_BE; // should change to UTF-16BE
+        oCharset.AssignWithConversion(UCS2_BE); // should change to UTF-16BE
         oCharsetSource= kCharsetFromByteOrderMark;
      }
    break;
@@ -1489,7 +1490,7 @@ static PRBool detectByteOrderMark(const unsigned char* aBytes, PRInt32 aLen, nsS
      if(0xFE==aBytes[1]) {
         // FF FE
         // UTF-16, little-endian 
-        oCharset = UCS2_LE; // should change to UTF-16LE
+        oCharset.AssignWithConversion(UCS2_LE); // should change to UTF-16LE
         oCharsetSource= kCharsetFromByteOrderMark;
      }
    break;
@@ -1565,7 +1566,7 @@ theContext->mTransferBufferSize;
         if(NS_SUCCEEDED(result) && (theNumRead>0)) { 
           if(needCheckFirst4Bytes && (theNumRead >= 4)) { 
              nsCharsetSource guessSource; 
-             nsAutoString guess(""); 
+             nsAutoString guess; 
   
              needCheckFirst4Bytes = PR_FALSE; 
              if(detectByteOrderMark((const unsigned char*)theContext->mTransferBuffer, 
@@ -1639,7 +1640,7 @@ nsresult nsParser::OnStopRequest(nsIChannel* channel, nsISupports* aContext,
     //If you're here, then OnDataAvailable() never got called. 
     //Prior to necko, we never dealt with this case, but the problem may have existed.
     //What we'll do (for now at least) is construct a blank HTML document.
-    nsAutoString  temp("<html><body></body></html>");
+    nsAutoString  temp; temp.AssignWithConversion("<html><body></body></html>");
     mParserContext->mScanner->Append(temp);
     result=ResumeParse(PR_TRUE,PR_TRUE);    
   }
diff --git a/mozilla/parser/htmlparser/src/nsParserModule.cpp b/mozilla/parser/htmlparser/src/nsParserModule.cpp
index 73e4f21a4de..5812d390f8d 100644
--- a/mozilla/parser/htmlparser/src/nsParserModule.cpp
+++ b/mozilla/parser/htmlparser/src/nsParserModule.cpp
@@ -78,7 +78,7 @@ nsParserService::HTMLStringTagToId(const nsString &aTag, PRInt32* aId) const
 NS_IMETHODIMP 
 nsParserService::HTMLIdToStringTag(PRInt32 aId, nsString& aTag) const
 {
-  aTag = nsHTMLTags::GetStringValue((nsHTMLTag)aId);
+  aTag.AssignWithConversion( nsHTMLTags::GetStringValue((nsHTMLTag)aId) );
   return NS_OK;
 }
   
diff --git a/mozilla/parser/htmlparser/src/nsParserNode.cpp b/mozilla/parser/htmlparser/src/nsParserNode.cpp
index b92349e5a3f..747bcf36809 100644
--- a/mozilla/parser/htmlparser/src/nsParserNode.cpp
+++ b/mozilla/parser/htmlparser/src/nsParserNode.cpp
@@ -35,7 +35,7 @@ static NS_DEFINE_IID(kIParserNodeIID, NS_IPARSER_NODE_IID);
 nsString& GetEmptyString() {
   static nsString* gEmptyStr=0;
   if(!gEmptyStr)
-    gEmptyStr=new nsString("");
+    gEmptyStr=new nsString;
   return *gEmptyStr;
 }
 
diff --git a/mozilla/parser/htmlparser/src/nsScanner.cpp b/mozilla/parser/htmlparser/src/nsScanner.cpp
index 34ac6a43252..04b48fc9d54 100644
--- a/mozilla/parser/htmlparser/src/nsScanner.cpp
+++ b/mozilla/parser/htmlparser/src/nsScanner.cpp
@@ -53,7 +53,7 @@ MOZ_DECL_CTOR_COUNTER(nsScanner);
  *  @return  
  */
 nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharsetSource aSource) : 
-  mBuffer(anHTMLString), mFilename(""), mUnicodeXferBuf("")
+  mBuffer(anHTMLString)
 {
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -64,7 +64,6 @@ nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharset
   mMarkPos=0;
   mInputStream=0;
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -80,7 +79,7 @@ nsScanner::nsScanner(nsString& anHTMLString, const nsString& aCharset, nsCharset
  *  @return  
  */
 nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& aCharset, nsCharsetSource aSource) : 
-    mBuffer(""), mFilename(aFilename), mUnicodeXferBuf("")
+    mFilename(aFilename)
 {
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -94,7 +93,6 @@ nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& a
 		mInputStream = new nsInputFileStream(nsFileSpec(aFilename));
   } //if
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -110,7 +108,7 @@ nsScanner::nsScanner(nsString& aFilename,PRBool aCreateStream, const nsString& a
  *  @return  
  */
 nsScanner::nsScanner(nsString& aFilename,nsInputStream& aStream,const nsString& aCharset, nsCharsetSource aSource) :
-    mBuffer(""), mFilename(aFilename) , mUnicodeXferBuf("")
+    mFilename(aFilename)
 {  
   MOZ_COUNT_CTOR(nsScanner);
 
@@ -121,7 +119,6 @@ nsScanner::nsScanner(nsString& aFilename,nsInputStream& aStream,const nsString&
   mOwnsStream=PR_FALSE;
   mInputStream=&aStream;
   mUnicodeDecoder = 0;
-  mCharset = "";
   mCharsetSource = kCharsetUninitialized;
   SetDocumentCharset(aCharset, aSource);
   mNewlinesSkipped=0;
@@ -152,7 +149,7 @@ nsresult nsScanner::SetDocumentCharset(const nsString& aCharset , nsCharsetSourc
     if(NS_FAILED(res) && (kCharsetUninitialized == mCharsetSource) )
     {
        // failed - unknown alias , fallback to ISO-8859-1
-      charsetName = "ISO-8859-1";
+      charsetName.AssignWithConversion("ISO-8859-1");
     }
     mCharset = charsetName;
     mCharsetSource = aSource;
@@ -241,10 +238,8 @@ PRUint32 nsScanner::Mark(PRInt32 anIndex){
  */
 PRBool nsScanner::Insert(const nsString& aBuffer) {
 
-  PRInt32 theLen=aBuffer.Length();
-
-  mBuffer.Insert(aBuffer,mOffset,theLen);
-  mTotalRead+=theLen;
+  mBuffer.Insert(aBuffer,mOffset);
+  mTotalRead+=aBuffer.Length();
   return PR_TRUE;
 }
 
@@ -317,7 +312,7 @@ PRBool nsScanner::Append(const char* aBuffer, PRUint32 aLen){
 	  // delete[] unichars;
   }
   else {
-    mBuffer.Append(aBuffer,aLen);
+    mBuffer.AppendWithConversion(aBuffer,aLen);
     mTotalRead+=aLen;
 
   }
@@ -394,7 +389,7 @@ nsresult nsScanner::FillBuffer(void) {
     }
     mOffset=mBuffer.Length();
     if((0<numread) && (0==result)) {
-      mBuffer.Append((const char*)buf,numread);
+      mBuffer.AppendWithConversion((const char*)buf,numread);
       mBuffer.StripChar(0);  //yank the nulls that come in from the net.
     }
     mTotalRead+=mBuffer.Length();
diff --git a/mozilla/parser/htmlparser/src/nsTagHandler.h b/mozilla/parser/htmlparser/src/nsTagHandler.h
index b2e21b16dca..6d8aaa0feaf 100644
--- a/mozilla/parser/htmlparser/src/nsTagHandler.h
+++ b/mozilla/parser/htmlparser/src/nsTagHandler.h
@@ -63,7 +63,7 @@ public:
    * @param aTheString -- The string (tag) associated with this handler
    * @return VOID
    */
-  void SetString(const nsString &aTheString) {mTheTagName = aTheString;}
+  void SetString(const nsString &aTheString) {mTheTagName.Assign(aTheString);}
 
   /**
    * Returns the string (tag) handled by this nsTagHandler
diff --git a/mozilla/parser/htmlparser/src/nsToken.cpp b/mozilla/parser/htmlparser/src/nsToken.cpp
index 3e1b2a90872..884a277cafd 100644
--- a/mozilla/parser/htmlparser/src/nsToken.cpp
+++ b/mozilla/parser/htmlparser/src/nsToken.cpp
@@ -72,8 +72,9 @@ CToken::CToken(const nsString& aName) : mTextValue(aName) {
  *  @update gess 3/25/98
  *  @param  aName--char* containing name of token
  */
-CToken::CToken(const char* aName) : mTextValue(aName) {
+CToken::CToken(const char* aName) {
   MOZ_COUNT_CTOR(CToken);
+  mTextValue.AssignWithConversion(aName);
   mTypeID=0;
   mAttrCount=0;
   TokenCount++;
@@ -164,7 +165,7 @@ void CToken::DebugDumpSource(nsOutputStream& anOutputStream) {
  * @param   name is a char* value containing new string value
  */
 void CToken::SetStringValue(const char* name){
-  mTextValue=name;
+  mTextValue.AssignWithConversion(name);
 }
 
 /**
diff --git a/mozilla/parser/htmlparser/src/nsViewSourceHTML.cpp b/mozilla/parser/htmlparser/src/nsViewSourceHTML.cpp
index f9d3ce348a2..d39081e4e2b 100644
--- a/mozilla/parser/htmlparser/src/nsViewSourceHTML.cpp
+++ b/mozilla/parser/htmlparser/src/nsViewSourceHTML.cpp
@@ -202,12 +202,21 @@ public:
  *  @param   
  *  @return  
  */
-CViewSourceHTML::CViewSourceHTML() : nsIDTD(), 
-  mStartTag("start"), mEndTag("end"), mCommentTag("comment"), 
-  mCDATATag("cdata"), mDocTypeTag("doctype"), mPITag("pi"), 
-  mEntityTag("entity"), mText("txt"), mKey("key"), mValue("val")
+CViewSourceHTML::CViewSourceHTML()
 {
   NS_INIT_REFCNT();
+
+  mStartTag.AssignWithConversion("start");
+  mEndTag.AssignWithConversion("end");
+  mCommentTag.AssignWithConversion("comment");
+  mCDATATag.AssignWithConversion("cdata");
+  mDocTypeTag.AssignWithConversion("doctype");
+  mPITag.AssignWithConversion("pi");
+  mEntityTag.AssignWithConversion("entity");
+  mText.AssignWithConversion("txt");
+  mKey.AssignWithConversion("key");
+  mValue.AssignWithConversion("val");
+
   mParser=0;
   mSink=0;
   mLineNumber=0;
@@ -269,15 +278,15 @@ nsresult CViewSourceHTML::CreateNewInstance(nsIDTD** aInstancePtrResult){
 eAutoDetectResult CViewSourceHTML::CanParse(CParserContext& aParserContext,nsString& aBuffer, PRInt32 aVersion) {
   eAutoDetectResult result=eUnknownDetect;
 
-  if(aParserContext.mMimeType.Equals(kPlainTextContentType) ||
-     aParserContext.mMimeType.Equals(kTextCSSContentType)) {
+  if(aParserContext.mMimeType.EqualsWithConversion(kPlainTextContentType) ||
+     aParserContext.mMimeType.EqualsWithConversion(kTextCSSContentType)) {
     result=eValidDetect;
   }
   else if(eViewSource==aParserContext.mParserCommand) {
-    if(aParserContext.mMimeType.Equals(kXMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kRDFTextContentType) ||
-       aParserContext.mMimeType.Equals(kHTMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kXULTextContentType)) {
+    if(aParserContext.mMimeType.EqualsWithConversion(kXMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kRDFTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kHTMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kXULTextContentType)) {
       result=ePrimaryDetect;
     }
   }
@@ -327,7 +336,7 @@ nsresult CViewSourceHTML::WillBuildModel(  const CParserContext& aParserContext,
     CToken theToken("viewsource");
     nsCParserNode theNode(&theToken,0);
 
-    CAttributeToken *theAttr=new CAttributeToken("xmlns","http://www.mozilla.org/viewsource");
+    CAttributeToken *theAttr=new CAttributeToken(NS_ConvertToString("xmlns"), NS_ConvertToString("http://www.mozilla.org/viewsource"));
     if(theAttr)
       theNode.AddAttribute(theAttr);
     mSink->OpenContainer(theNode);
@@ -664,7 +673,7 @@ nsresult WriteText(const nsString& aTextString,nsIContentSink& aSink,PRBool aPre
     }
     if(0<theSpaces){
 
-      CEntityToken theToken("nbsp");
+      CEntityToken theToken( NS_ConvertToString("nbsp") );
       aContext.mStartNode.Init(&theToken);
       int theIndex;
       for(theIndex=0;theIndex<theSpaces;theIndex++)
@@ -748,7 +757,7 @@ nsresult CViewSourceHTML::WriteAttributes(PRInt32 attrCount) {
  *  @return  result status
  */
 nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,CToken* aToken,PRInt32 attrCount,PRBool aNewlineRequired) {
-  static nsString       theString("");
+  static nsString       theString;
 
   nsresult result=NS_OK;
 
@@ -811,7 +820,7 @@ nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,CToken* aToken,PRInt3
  *  @return  result status
  */
 nsresult CViewSourceHTML::WriteTag(nsString &theXMLTagName,nsString & aText,PRInt32 attrCount,PRBool aNewlineRequired) {
-  static nsString       theString("");
+  static nsString       theString;
 
   nsresult result=NS_OK;
 
@@ -893,7 +902,7 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
           void*             theDocID=(pc)? pc->mKey:0; 
           eHTMLTags         theTag=(eHTMLTags)theToken->GetTypeID();  
 
-          result=theService->Notify(theTag,theContext.mTokenNode,(PRUint32)theDocID,kViewSourceCommand,mParser);
+          result=theService->Notify(theTag,theContext.mTokenNode,(PRUint32)theDocID, NS_ConvertToString(kViewSourceCommand), mParser);
         }
       }
       theContext.mTokenNode.Init(0,0,gTokenRecycler);  //now recycle.
@@ -906,8 +915,8 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
     case eToken_cdatasection:
       {
         nsString& theStr=aToken->GetStringValueXXX();
-        theStr.Insert("<!",0);
-        theStr.Append("]]>");
+        theStr.InsertWithConversion("<!",0);
+        theStr.AppendWithConversion("]]>");
         result=WriteTag(mCDATATag,aToken,0,PR_TRUE);
       }
       break;
@@ -933,10 +942,10 @@ NS_IMETHODIMP CViewSourceHTML::HandleToken(CToken* aToken,nsIParser* aParser) {
       {
         nsAutoString theStr;
         nsString& theEntity=aToken->GetStringValueXXX();
-        if(!theEntity.Equals("XI",IGNORE_CASE)) {
+        if(!theEntity.EqualsWithConversion("XI",IGNORE_CASE)) {
           PRUnichar theChar=theEntity.CharAt(0);
           if((nsCRT::IsAsciiDigit(theChar)) || ('X'==theChar) || ('x'==theChar)){
-            theStr.Append("#");
+            theStr.AppendWithConversion("#");
           }
           theStr.Append(theEntity);
         }
diff --git a/mozilla/parser/htmlparser/src/nsWellFormedDTD.cpp b/mozilla/parser/htmlparser/src/nsWellFormedDTD.cpp
index 59feff06562..88961eaf146 100644
--- a/mozilla/parser/htmlparser/src/nsWellFormedDTD.cpp
+++ b/mozilla/parser/htmlparser/src/nsWellFormedDTD.cpp
@@ -122,7 +122,7 @@ NS_IMPL_RELEASE(CWellFormedDTD)
  *  @param   
  *  @return  
  */
-CWellFormedDTD::CWellFormedDTD() : nsIDTD(), mFilename("") {
+CWellFormedDTD::CWellFormedDTD() : nsIDTD() {
   NS_INIT_REFCNT();
   mParser=0;
   mSink=0;
@@ -177,15 +177,15 @@ eAutoDetectResult CWellFormedDTD::CanParse(CParserContext& aParserContext,nsStri
   eAutoDetectResult result=eUnknownDetect;
 
   if(eViewSource!=aParserContext.mParserCommand) {
-    if(aParserContext.mMimeType.Equals(kXMLTextContentType) ||
-       aParserContext.mMimeType.Equals(kRDFTextContentType) ||
-       aParserContext.mMimeType.Equals(kXULTextContentType)) {
+    if(aParserContext.mMimeType.EqualsWithConversion(kXMLTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kRDFTextContentType) ||
+       aParserContext.mMimeType.EqualsWithConversion(kXULTextContentType)) {
       result=ePrimaryDetect;
     }
     else {
       if(-1<aBuffer.Find("<?xml ")) {
         if(0==aParserContext.mMimeType.Length()) {
-          aParserContext.SetMimeType(kXMLTextContentType);
+          aParserContext.SetMimeType( NS_ConvertToString(kXMLTextContentType) );
         }
         result=eValidDetect;
       }
diff --git a/mozilla/parser/htmlparser/src/nsXIFDTD.cpp b/mozilla/parser/htmlparser/src/nsXIFDTD.cpp
index 397751ab802..c35ec714f3b 100644
--- a/mozilla/parser/htmlparser/src/nsXIFDTD.cpp
+++ b/mozilla/parser/htmlparser/src/nsXIFDTD.cpp
@@ -174,7 +174,7 @@ eXIFTags DetermineXIFTagType(const nsString& aString)
   
   while(low<=high){
     middle=(PRInt32)(low+high)/2;
-    result=aString.Compare(gXIFTagTable[middle].mName, PR_TRUE); 
+    result=aString.CompareWithConversion(gXIFTagTable[middle].mName, PR_TRUE); 
     if (result==0)
       return gXIFTagTable[middle].fTagID; 
     if (result<0)
@@ -251,7 +251,7 @@ nsXIFDTD::nsXIFDTD() : nsIDTD(){
   mInContent=PR_FALSE;
   mLowerCaseAttributes=PR_TRUE;
   mLowerCaseTags=PR_TRUE;
-  mCharset = "";
+  mCharset.SetLength(0);
   mSink=0;
 }
 
@@ -303,18 +303,18 @@ nsresult nsXIFDTD::CreateNewInstance(nsIDTD** aInstancePtrResult){
 eAutoDetectResult nsXIFDTD::CanParse(CParserContext& aParserContext,nsString& aBuffer, PRInt32 aVersion) {
   eAutoDetectResult result=eUnknownDetect;
 
-  if(aParserContext.mMimeType.Equals(kXIFTextContentType)){
+  if(aParserContext.mMimeType.EqualsWithConversion(kXIFTextContentType)){
     result=ePrimaryDetect;
   }
   else 
   {
     if(kNotFound!=aBuffer.Find(kXIFDocHeader)) {
-      aParserContext.SetMimeType(kXIFTextContentType);
+      aParserContext.SetMimeType( NS_ConvertToString(kXIFTextContentType) );
       result=ePrimaryDetect;
     }
   }
   
-  nsString charset("ISO-8859-1");
+  nsString charset; charset.AssignWithConversion("ISO-8859-1");
   PRInt32 offset;
   offset = aBuffer.Find(kXIFDocInfo);
 
@@ -534,7 +534,7 @@ nsresult nsXIFDTD::HandleTextToken(CToken* aToken) {
   {
     nsString& temp = aToken->GetStringValueXXX();
 
-    if (!temp.Equals("<xml version=\"1.0\"?>"))
+    if (!temp.EqualsWithConversion("<xml version=\"1.0\"?>"))
     {
       result= AddLeaf(node);
     }
@@ -872,9 +872,9 @@ PRBool nsXIFDTD::GetAttributePair(nsIParserNode& aNode, nsString& aKey, nsString
     key.StripChars(quote);
     value.StripChars(quote);
 
-    if (key.Equals("name"))
+    if (key.EqualsWithConversion("name"))
       aKey = value;
-    if (key.Equals("value"))
+    if (key.EqualsWithConversion("value"))
     {
       aValue = value;
       hasValue = PR_TRUE;
@@ -901,12 +901,12 @@ eHTMLTags nsXIFDTD::GetStartTag(const nsIParserNode& aNode, nsString& aName)
   {
     case eXIFTag_container:
     case eXIFTag_leaf:
-      if (GetAttribute(aNode,nsString("isa"),aName))
+      if (GetAttribute(aNode,NS_ConvertToString("isa"),aName))
         tag = tag = nsHTMLTags::LookupTag(aName);
     break;
 
     case eXIFTag_css_stylesheet:
-      aName = "style";
+      aName.AssignWithConversion("style");
       tag = nsHTMLTags::LookupTag(aName);
     break;  
 
@@ -1299,7 +1299,7 @@ nsresult nsXIFDTD::CollectContentComment(CToken* aToken, nsCParserNode& aNode) {
       PRBool       done=PR_FALSE;
       PRBool       inContent=PR_FALSE;
       nsString&    comment=aToken->GetStringValueXXX(); 
-      comment="<!--"; // overwrite comment with "<!--"
+      comment.AssignWithConversion("<!--"); // overwrite comment with "<!--"
       while (!done && NS_SUCCEEDED(result))
       {
         token=mTokenizer->PopToken();
@@ -1307,14 +1307,14 @@ nsresult nsXIFDTD::CollectContentComment(CToken* aToken, nsCParserNode& aNode) {
         if(!token) return result;
 
         type=(eHTMLTokenTypes)token->GetTokenType();
-        fragment=token->GetStringValueXXX();
-        if(fragment.Equals("content")) {
+        fragment.Assign(token->GetStringValueXXX());
+        if(fragment.EqualsWithConversion("content")) {
           if(type==eToken_start) 
             inContent=PR_TRUE;
           else inContent=PR_FALSE;
         }
-        else if(fragment.Equals("comment")) {
-          comment.Append("-->");
+        else if(fragment.EqualsWithConversion("comment")) {
+          comment.AppendWithConversion("-->");
           result=(mSink)? mSink->AddComment(aNode):NS_OK;
           done=PR_TRUE;
         }
@@ -1414,7 +1414,7 @@ void nsXIFDTD::ProcessEncodeTag(const nsIParserNode& aNode)
   nsString value;
   PRInt32  error;
 
-  if (GetAttribute(aNode,nsString("selection"),value))
+  if (GetAttribute(aNode,NS_ConvertToString("selection"),value))
   {
     PRInt32 temp = value.ToInteger(&error);
     if (temp == 1)
@@ -1431,7 +1431,7 @@ void nsXIFDTD::ProcessEntityTag(const nsIParserNode& aNode)
 {
   nsAutoString value;
 
-  if (GetAttribute(aNode,nsString("value"),value)) {
+  if (GetAttribute(aNode,NS_ConvertToString("value"),value)) {
     value+=';';
     CEntityToken* entity = new CEntityToken(value);
     nsCParserNode node((CToken*)entity);
@@ -1448,7 +1448,7 @@ void nsXIFDTD::BeginCSSStyleSheet(const nsIParserNode& aNode)
 
   mBuffer.Truncate(0);
   mMaxCSSSelectorWidth = 10;
-  if (GetAttribute(aNode,nsString("max_css_selector_width"),value))
+  if (GetAttribute(aNode,NS_ConvertToString("max_css_selector_width"),value))
   {
     PRInt32 temp = value.ToInteger(&error);
     if (error == NS_OK)
@@ -1470,9 +1470,9 @@ void nsXIFDTD::EndCSSStyleSheet(const nsIParserNode& aNode)
   CStartToken   startToken(tagName);
   nsCParserNode startNode((CToken*)&startToken);
 
-  mBuffer.Append("</");
+  mBuffer.AppendWithConversion("</");
   mBuffer.Append(tagName);
-  mBuffer.Append(">");
+  mBuffer.AppendWithConversion(">");
   startNode.SetSkippedContent(mBuffer);
   mSink->AddLeaf(startNode);
 
@@ -1494,7 +1494,7 @@ void nsXIFDTD::AddCSSSelector(const nsIParserNode& aNode)
 {
   nsString value;
 
-  if (GetAttribute(aNode, nsString("selectors"), value))
+  if (GetAttribute(aNode, NS_ConvertToString("selectors"), value))
   {
     if (mLowerCaseAttributes == PR_TRUE)
       value.ToLowerCase();
@@ -1517,16 +1517,16 @@ void nsXIFDTD::BeginCSSDeclarationList(const nsIParserNode& aNode)
     count = 0;
 
   for (PRInt32 i = 0; i < count; i++)
-    mBuffer.Append(" ");
+    mBuffer.AppendWithConversion(" ");
 
-  mBuffer.Append("   {");
+  mBuffer.AppendWithConversion("   {");
   mCSSDeclarationCount = 0;
 
 }
 
 void nsXIFDTD::EndCSSDeclarationList(const nsIParserNode& aNode)
 {
-  mBuffer.Append("}\n");
+  mBuffer.AppendWithConversion("}\n");
 }
 
 
@@ -1536,14 +1536,14 @@ void nsXIFDTD::AddCSSDeclaration(const nsIParserNode& aNode)
   nsString value;
 
 
-  if (PR_TRUE == GetAttribute(aNode, nsString("property"), property))
-    if (PR_TRUE == GetAttribute(aNode, nsString("value"), value))
+  if (PR_TRUE == GetAttribute(aNode, NS_ConvertToString("property"), property))
+    if (PR_TRUE == GetAttribute(aNode, NS_ConvertToString("value"), value))
     {
       if (mCSSDeclarationCount != 0)
-        mBuffer.Append(";");
-      mBuffer.Append(" ");
+        mBuffer.AppendWithConversion(";");
+      mBuffer.AppendWithConversion(" ");
       mBuffer.Append(property);
-      mBuffer.Append(": ");
+      mBuffer.AppendWithConversion(": ");
       mBuffer.Append(value);
       mCSSDeclarationCount++;
     }
diff --git a/mozilla/parser/htmlparser/src/nsXMLTokenizer.cpp b/mozilla/parser/htmlparser/src/nsXMLTokenizer.cpp
index 12368e2ebb9..7cb88064a60 100644
--- a/mozilla/parser/htmlparser/src/nsXMLTokenizer.cpp
+++ b/mozilla/parser/htmlparser/src/nsXMLTokenizer.cpp
@@ -237,7 +237,7 @@ nsresult nsXMLTokenizer::ConsumeSpecialMarkup(PRUnichar aChar,CToken*& aToken,ns
     PRBool isComment=PR_TRUE; 
     nsAutoString  theEmpty;
     if(theChar==kLeftSquareBracket) {
-      nsAutoString CDATAString("[CDATA[");
+      nsAutoString CDATAString; CDATAString.AssignWithConversion("[CDATA[");
       PRBool isCDATA = PR_FALSE;
       result = ConsumeConditional(aScanner, CDATAString, isCDATA);
       if (NS_OK == result) {