diff --git a/mozilla/mailnews/base/search/src/nsMsgFilterService.cpp b/mozilla/mailnews/base/search/src/nsMsgFilterService.cpp

index e260c45..50e2a92 100644

--- mozilla/mailnews/base/search/src/nsMsgFilterService.cpp

+++ mozilla/mailnews/base/search/src/nsMsgFilterService.cpp

@@ -142,6 +142,9 @@ NS_IMETHODIMP	nsMsgFilterService::SaveFilterList(nsIMsgFilterList *filterList, n

   NS_ENSURE_ARG_POINTER(filterFile);

   NS_ENSURE_ARG_POINTER(filterList);

+  PRBool tmpExists;

+  nsresult rv;

+

   nsresult ret = NS_OK;

   nsCOMPtr <nsIFileSpec> tmpFiltersFile;

   nsCOMPtr <nsIFileSpec> realFiltersFile;

@@ -193,11 +196,14 @@ NS_IMETHODIMP	nsMsgFilterService::SaveFilterList(nsIMsgFilterList *filterList, n

         parentDir->Rename(finalLeafName);

       else // fall back to msgFilterRules.dat

         parentDir->Rename("msgFilterRules.dat");

-

-      tmpFiltersFile->Delete(PR_FALSE);

     }

   }

+

+  rv = tmpFiltersFile->Exists(&tmpExists);

+  if (NS_SUCCEEDED(rv) && tmpExists)

+    tmpFiltersFile->Delete(PR_FALSE);

+

   NS_ASSERTION(NS_SUCCEEDED(ret), "error opening/saving filter list");

 	return ret;

 }