diff --git a/browser/base/content/browser.js b/browser/base/content/browser.js
index 9795a0fa7c90..03c7304ae7c2 100644
--- a/browser/base/content/browser.js
+++ b/browser/base/content/browser.js
@@ -218,7 +218,7 @@ function UpdateBackForwardButtons()
 function UpdatePageReport(event)
 {
   if (!gReportButton)
-    return;
+    gReportButton = document.getElementById("page-report-button");
 
   if (gBrowser.mCurrentBrowser.pageReport) {
     gReportButton.setAttribute("blocked", "true");
@@ -256,8 +256,7 @@ function Startup()
   // init globals
   gNavigatorBundle = document.getElementById("bundle_browser");
   gBrowser = document.getElementById("content");
-  gURLBar = document.getElementById("urlbar");
-  gReportButton = document.getElementById("page-report-button");
+  gURLBar = document.getElementById("urlbar");  
 
   gBrowser.addEventListener("DOMUpdatePageReport", UpdatePageReport, false);
 
diff --git a/browser/components/downloads/src/nsDownloadManager.cpp b/browser/components/downloads/src/nsDownloadManager.cpp
index 7f7f18fa101c..068091599d21 100644
--- a/browser/components/downloads/src/nsDownloadManager.cpp
+++ b/browser/components/downloads/src/nsDownloadManager.cpp
@@ -97,7 +97,7 @@ nsDownloadManager::nsDownloadManager() : mBatches(0)
 
 nsDownloadManager::~nsDownloadManager()
 {
-  if (--gRefCnt != 0 || !gRDFService)
+  if (--gRefCnt != 0 || !gRDFService  || !gObserverService)
     // Either somebody tried to use |CreateInstance| instead of
     // |GetService| or |Init| failed very early, so there's nothing to
     // do here.