diff --git a/mozilla/htmlparser/robot/nsDebugRobot.cpp b/mozilla/htmlparser/robot/nsDebugRobot.cpp
index d1806eb89c9..a930f147b9c 100644
--- a/mozilla/htmlparser/robot/nsDebugRobot.cpp
+++ b/mozilla/htmlparser/robot/nsDebugRobot.cpp
@@ -310,7 +310,6 @@ extern "C" NS_EXPORT int DebugRobot(
       while (!g_bReadyForNextUrl) {
         if (yieldProc != NULL) {
 #ifdef NECKO
-          char* spec;
           (void)url->GetSpec(&spec);
           (*yieldProc)(spec);
           nsCRT::free(spec);
diff --git a/mozilla/netwerk/base/src/nsIOService.cpp b/mozilla/netwerk/base/src/nsIOService.cpp
index c5f5e6e44ff..1311511e985 100644
--- a/mozilla/netwerk/base/src/nsIOService.cpp
+++ b/mozilla/netwerk/base/src/nsIOService.cpp
@@ -145,7 +145,6 @@ GetScheme(const char* inURI, char* *scheme)
     if (!inURI) return NS_ERROR_NULL_POINTER;
     char c;
     const char* URI = inURI;
-    PRUint32 i = 0;
     PRUint32 length = 0;
     // skip leading white space
     while (isspace(*URI))
diff --git a/mozilla/netwerk/base/src/nsSimpleURI.cpp b/mozilla/netwerk/base/src/nsSimpleURI.cpp
index f717e353504..eaaa0c3eb5f 100644
--- a/mozilla/netwerk/base/src/nsSimpleURI.cpp
+++ b/mozilla/netwerk/base/src/nsSimpleURI.cpp
@@ -87,14 +87,14 @@ NS_IMETHODIMP
 nsSimpleURI::SetSpec(const char* aSpec)
 {
     nsAutoString spec(aSpec);
-    PRUint32 pos = spec.Find(":");
+    PRInt32 pos = spec.Find(":");
     if (pos == -1)
         return NS_ERROR_FAILURE;
     nsAutoString scheme;
-    PRUint32 n = spec.Left(scheme, pos);
+    PRInt32 n = spec.Left(scheme, pos);
     NS_ASSERTION(n == pos, "Left failed");
     nsAutoString path;
-    PRUint32 count = spec.Length() - pos - 1;
+    PRInt32 count = spec.Length() - pos - 1;
     n = spec.Mid(path, pos + 1, count);
     NS_ASSERTION(n == count, "Mid failed");
     if (mScheme) 
diff --git a/mozilla/netwerk/streamconv/test/TestStreamConv.cpp b/mozilla/netwerk/streamconv/test/TestStreamConv.cpp
index 397e4717b3c..948b25edd4f 100644
--- a/mozilla/netwerk/streamconv/test/TestStreamConv.cpp
+++ b/mozilla/netwerk/streamconv/test/TestStreamConv.cpp
@@ -84,7 +84,7 @@ public:
         rv = inStr->Read(buffer, len, &read);
         buffer[len] = '\0';
         if (NS_SUCCEEDED(rv)) {
-            printf("CONTEXT %x: Received %d bytes and the following data: \n %s\n\n", ctxt, read, buffer);
+            printf("CONTEXT %x: Received %u bytes and the following data: \n %s\n\n", ctxt, read, buffer);
         }
         nsAllocator::Free(buffer);
 
diff --git a/mozilla/parser/htmlparser/robot/nsDebugRobot.cpp b/mozilla/parser/htmlparser/robot/nsDebugRobot.cpp
index d1806eb89c9..a930f147b9c 100644
--- a/mozilla/parser/htmlparser/robot/nsDebugRobot.cpp
+++ b/mozilla/parser/htmlparser/robot/nsDebugRobot.cpp
@@ -310,7 +310,6 @@ extern "C" NS_EXPORT int DebugRobot(
       while (!g_bReadyForNextUrl) {
         if (yieldProc != NULL) {
 #ifdef NECKO
-          char* spec;
           (void)url->GetSpec(&spec);
           (*yieldProc)(spec);
           nsCRT::free(spec);
diff --git a/mozilla/uriloader/base/nsDocLoader.cpp b/mozilla/uriloader/base/nsDocLoader.cpp
index 70f5e547f27..dde3f066f37 100644
--- a/mozilla/uriloader/base/nsDocLoader.cpp
+++ b/mozilla/uriloader/base/nsDocLoader.cpp
@@ -341,7 +341,7 @@ nsDocLoaderImpl::Init()
     if (NS_FAILED(rv)) return rv;
 
     PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, 
-           ("DocLoader:%p: load group %x.\n", this, mLoadGroup));
+           ("DocLoader:%p: load group %x.\n", this, mLoadGroup.get()));
 
     rv = mLoadGroup->SetGroupListenerFactory(this);
     if (NS_FAILED(rv)) return rv;
diff --git a/mozilla/webshell/src/nsDocLoader.cpp b/mozilla/webshell/src/nsDocLoader.cpp
index 70f5e547f27..dde3f066f37 100644
--- a/mozilla/webshell/src/nsDocLoader.cpp
+++ b/mozilla/webshell/src/nsDocLoader.cpp
@@ -341,7 +341,7 @@ nsDocLoaderImpl::Init()
     if (NS_FAILED(rv)) return rv;
 
     PR_LOG(gDocLoaderLog, PR_LOG_DEBUG, 
-           ("DocLoader:%p: load group %x.\n", this, mLoadGroup));
+           ("DocLoader:%p: load group %x.\n", this, mLoadGroup.get()));
 
     rv = mLoadGroup->SetGroupListenerFactory(this);
     if (NS_FAILED(rv)) return rv;
diff --git a/mozilla/xpcom/io/nsPipe2.cpp b/mozilla/xpcom/io/nsPipe2.cpp
index 4a67da7232e..26b0afa9cd5 100644
--- a/mozilla/xpcom/io/nsPipe2.cpp
+++ b/mozilla/xpcom/io/nsPipe2.cpp
@@ -224,7 +224,6 @@ nsPipe::GetReadSegment(PRUint32 segmentLogicalOffset,
 
     PRInt32 offset = (PRInt32)segmentLogicalOffset;
     PRInt32 segCount = mBuffer.GetSegmentCount();
-    PRBool atEnd = PR_FALSE;
     for (PRInt32 i = 0; i < segCount; i++) {
         char* segStart = mBuffer.GetSegment(i);
         char* segEnd = segStart + mBuffer.GetSegmentSize();