diff --git a/content/base/public/nsIDocument.h b/content/base/public/nsIDocument.h
index 9312ae7474c..bb4268fa9fe 100644
--- a/content/base/public/nsIDocument.h
+++ b/content/base/public/nsIDocument.h
@@ -366,6 +366,7 @@ public:
   NS_IMETHOD GetNodeInfoManager(nsINodeInfoManager*& aNodeInfoManager) = 0;
 
   NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup) = 0;
+  NS_IMETHOD ResetToURI(nsIURI *aURI, nsILoadGroup* aLoadGroup) = 0;
 
   NS_IMETHOD AddReference(void *aKey, nsISupports *aReference) = 0;
   NS_IMETHOD RemoveReference(void *aKey, nsISupports **aOldReference) = 0;
diff --git a/content/base/src/nsDocument.h b/content/base/src/nsDocument.h
index 913bb0c6e81..6ef113d8910 100644
--- a/content/base/src/nsDocument.h
+++ b/content/base/src/nsDocument.h
@@ -242,6 +242,7 @@ public:
   NS_IMETHOD GetArena(nsIArena** aArena);
 
   NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
+  NS_IMETHOD ResetToURI(nsIURI *aURI, nsILoadGroup *aLoadGroup);
 
   NS_IMETHOD StartDocumentLoad(const char* aCommand,
                                nsIChannel* aChannel,
diff --git a/content/html/document/src/nsHTMLDocument.cpp b/content/html/document/src/nsHTMLDocument.cpp
index fcddcf5964a..cf9e2de2103 100644
--- a/content/html/document/src/nsHTMLDocument.cpp
+++ b/content/html/document/src/nsHTMLDocument.cpp
@@ -324,6 +324,25 @@ nsHTMLDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
         return result;
   }
 
+  return BaseResetToURI(aURL);
+}
+
+
+NS_IMETHODIMP
+nsHTMLDocument::ResetToURI(nsIURI *aURI, nsILoadGroup *aLoadGroup)
+{
+  nsresult result = nsDocument::ResetToURI(aURI, aLoadGroup);
+  if (NS_SUCCEEDED(result))
+    result = BaseResetToURI(aURI);
+  return result;
+}
+
+
+nsresult
+nsHTMLDocument::BaseResetToURI(nsIURI *aURL)
+{
+  nsresult result = NS_OK;
+
   InvalidateHashTables();
   PrePopulateHashTables();
 
@@ -376,6 +395,7 @@ nsHTMLDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
   return result;
 }
 
+
 NS_IMETHODIMP
 nsHTMLDocument::CreateShell(nsIPresContext* aContext,
                             nsIViewManager* aViewManager,
@@ -3728,12 +3748,13 @@ nsHTMLDocument::RemoveDocWriteDummyRequest(void)
   rv = GetDocumentLoadGroup(getter_AddRefs(loadGroup));
   if (NS_FAILED(rv)) return rv;
 
+  // note there can be a write request without a load group if
+  // this is a synchronously constructed about:blank document
   if (loadGroup && mDocWriteDummyRequest) {
     rv = loadGroup->RemoveRequest(mDocWriteDummyRequest, nsnull, NS_OK);
     if (NS_FAILED(rv)) return rv;
-
-    mDocWriteDummyRequest = nsnull;
   }
+  mDocWriteDummyRequest = nsnull;
 
   return rv;
 }
diff --git a/content/html/document/src/nsHTMLDocument.h b/content/html/document/src/nsHTMLDocument.h
index 194d8beaffa..cd54fce33a6 100644
--- a/content/html/document/src/nsHTMLDocument.h
+++ b/content/html/document/src/nsHTMLDocument.h
@@ -63,6 +63,7 @@ class nsIHTMLStyleSheet;
 class nsIHTMLCSSStyleSheet;
 class nsIParser;
 class nsICSSLoader;
+class nsIURI;
 
 class nsHTMLDocument : public nsMarkupDocument,
                        public nsIHTMLDocument,
@@ -80,6 +81,7 @@ public:
   NS_IMETHOD_(nsrefcnt) Release(void);
 
   NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
+  NS_IMETHOD ResetToURI(nsIURI* aURI, nsILoadGroup* aLoadGroup);
 
   NS_IMETHOD CreateShell(nsIPresContext* aContext,
                          nsIViewManager* aViewManager,
@@ -215,6 +217,8 @@ protected:
   nsresult AddDocWriteDummyRequest(void);
   nsresult RemoveDocWriteDummyRequest(void);
 
+  nsresult BaseResetToURI(nsIURI* aURI);
+
   nsIHTMLStyleSheet*    mAttrStyleSheet;
   nsIHTMLCSSStyleSheet* mStyleAttrStyleSheet;
   nsIURI*     mBaseURL;
diff --git a/content/xul/document/src/nsXULDocument.cpp b/content/xul/document/src/nsXULDocument.cpp
index d1380a76442..4dd6b41b787 100644
--- a/content/xul/document/src/nsXULDocument.cpp
+++ b/content/xul/document/src/nsXULDocument.cpp
@@ -637,6 +637,13 @@ nsXULDocument::Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup)
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 
+NS_IMETHODIMP
+nsXULDocument::ResetToURI(nsIURI* aURI, nsILoadGroup* aLoadGroup)
+{
+    NS_NOTREACHED("ResetToURI");
+    return NS_ERROR_NOT_IMPLEMENTED;
+}
+
 NS_IMETHODIMP
 nsXULDocument::GetArena(nsIArena** aArena)
 {
diff --git a/content/xul/document/src/nsXULDocument.h b/content/xul/document/src/nsXULDocument.h
index f904c98330d..9061cd856cb 100644
--- a/content/xul/document/src/nsXULDocument.h
+++ b/content/xul/document/src/nsXULDocument.h
@@ -143,6 +143,7 @@ public:
     NS_IMETHOD GetArena(nsIArena** aArena);
 
     NS_IMETHOD Reset(nsIChannel* aChannel, nsILoadGroup* aLoadGroup);
+    NS_IMETHOD ResetToURI(nsIURI *aURI, nsILoadGroup* aLoadGroup);
 
     NS_IMETHOD StartDocumentLoad(const char* aCommand,
                                  nsIChannel *channel,