diff --git a/mozilla/layout/style/nsCSSDeclaration.cpp b/mozilla/layout/style/nsCSSDeclaration.cpp
index 6f06a9613f6..71ad35bcbcb 100644
--- a/mozilla/layout/style/nsCSSDeclaration.cpp
+++ b/mozilla/layout/style/nsCSSDeclaration.cpp
@@ -43,6 +43,7 @@
  */
 
 #include "nscore.h"
+#include "prlog.h"
 #include "nsCSSDeclaration.h"
 #include "nsString.h"
 #include "nsIAtom.h"
@@ -83,21 +84,23 @@
 #define B_BORDER              0xfff
 
 nsCSSDeclaration::nsCSSDeclaration() 
-  : mOrder(eCSSProperty_COUNT_no_shorthands, 8),
-    mData(nsnull),
+  : mData(nsnull),
     mImportantData(nsnull)
 {
+  // check that we can fit all the CSS properties into a PRUint8
+  // for the mOrder array - if not, might need to use PRUint16!
+  PR_STATIC_ASSERT(eCSSProperty_COUNT_no_shorthands - 1 <= PR_UINT8_MAX);
+
   MOZ_COUNT_CTOR(nsCSSDeclaration);
 }
 
 nsCSSDeclaration::nsCSSDeclaration(const nsCSSDeclaration& aCopy)
-  : mOrder(eCSSProperty_COUNT_no_shorthands, aCopy.mOrder.Count()),
+  : mOrder(aCopy.mOrder),
     mData(aCopy.mData ? aCopy.mData->Clone() : nsnull),
     mImportantData(aCopy.mImportantData ? aCopy.mImportantData->Clone()
                                          : nsnull)
 {
   MOZ_COUNT_CTOR(nsCSSDeclaration);
-  mOrder = aCopy.mOrder;
 }
 
 nsCSSDeclaration::~nsCSSDeclaration(void)
@@ -118,12 +121,12 @@ nsCSSDeclaration::ValueAppended(nsCSSProperty aProperty)
   // order IS important for CSS, so remove and add to the end
   if (nsCSSProps::IsShorthand(aProperty)) {
     CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) {
-      mOrder.RemoveValue(*p);
-      mOrder.AppendValue(*p);
+      mOrder.RemoveElement(*p);
+      mOrder.AppendElement(*p);
     }
   } else {
-    mOrder.RemoveValue(aProperty);
-    mOrder.AppendValue(aProperty);
+    mOrder.RemoveElement(aProperty);
+    mOrder.AppendElement(aProperty);
   }
   return NS_OK;
 }
@@ -138,11 +141,11 @@ nsCSSDeclaration::RemoveProperty(nsCSSProperty aProperty)
   if (nsCSSProps::IsShorthand(aProperty)) {
     CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) {
       data.ClearProperty(*p);
-      mOrder.RemoveValue(*p);
+      mOrder.RemoveElement(*p);
     }
   } else {
     data.ClearProperty(aProperty);
-    mOrder.RemoveValue(aProperty);
+    mOrder.RemoveElement(aProperty);
   }
 
   data.Compress(&mData, &mImportantData);
@@ -1114,7 +1117,7 @@ void nsCSSDeclaration::PropertyIsSet(PRInt32 & aPropertyIndex, PRInt32 aIndex, P
 nsresult
 nsCSSDeclaration::ToString(nsAString& aString) const
 {
-  PRInt32 count = mOrder.Count();
+  PRInt32 count = mOrder.Length();
   PRInt32 index;
   // 0 means not in the mOrder array; otherwise it's index+1
   PRInt32 borderTopWidth = 0, borderTopStyle = 0, borderTopColor = 0;
@@ -1445,17 +1448,11 @@ void nsCSSDeclaration::List(FILE* out, PRInt32 aIndent) const
 }
 #endif
 
-PRUint32
-nsCSSDeclaration::Count() const
-{
-  return (PRUint32)mOrder.Count();
-}
-
 nsresult
 nsCSSDeclaration::GetNthProperty(PRUint32 aIndex, nsAString& aReturn) const
 {
   aReturn.Truncate();
-  if (aIndex < (PRUint32)mOrder.Count()) {
+  if (aIndex < mOrder.Length()) {
     nsCSSProperty property = OrderValueAt(aIndex);
     if (0 <= property) {
       AppendASCIItoUTF16(nsCSSProps::GetStringValue(property), aReturn);
diff --git a/mozilla/layout/style/nsCSSDeclaration.h b/mozilla/layout/style/nsCSSDeclaration.h
index 15b87de673b..f977611a835 100644
--- a/mozilla/layout/style/nsCSSDeclaration.h
+++ b/mozilla/layout/style/nsCSSDeclaration.h
@@ -51,7 +51,7 @@
 #include "nsCoord.h"
 #include "nsCSSValue.h"
 #include "nsCSSProps.h"
-#include "nsValueArray.h"
+#include "nsTArray.h"
 #include "nsCSSDataBlock.h"
 #include "nsCSSStruct.h"
 
@@ -83,7 +83,9 @@ public:
   PRBool GetValueIsImportant(nsCSSProperty aProperty) const;
   PRBool GetValueIsImportant(const nsAString& aProperty) const;
 
-  PRUint32 Count() const;
+  PRUint32 Count() const {
+    return mOrder.Length(); 
+  }
   nsresult GetNthProperty(PRUint32 aIndex, nsAString& aReturn) const;
 
   nsresult ToString(nsAString& aString) const;
@@ -247,12 +249,12 @@ private:
   // Block everyone, except us or a derivative, from deleting us.
   ~nsCSSDeclaration(void);
     
-  nsCSSProperty OrderValueAt(nsValueArrayIndex aValue) const {
-    return nsCSSProperty(mOrder.ValueAt(aValue));
+  nsCSSProperty OrderValueAt(PRUint32 aValue) const {
+    return nsCSSProperty(mOrder.ElementAt(aValue));
   }
 
 private:
-    nsValueArray mOrder;
+    nsAutoTArray<PRUint8, 8> mOrder;
     nsAutoRefCnt mRefCnt;
     nsCSSCompressedDataBlock *mData; // never null, except while expanded
     nsCSSCompressedDataBlock *mImportantData; // may be null