Bug 500882 another followup. This assertion is currently false for comboboxes; we need to fix them first. Needed to fix orange.

content/base/public/nsIContent.h

@@ -865,8 +865,8 @@ public:
    */
   nsIFrame* GetPrimaryFrame() const { return mPrimaryFrame; }
   void SetPrimaryFrame(nsIFrame* aFrame) {
-    NS_PRECONDITION(!aFrame || !mPrimaryFrame || aFrame == mPrimaryFrame,
-                    "Losing track of existing primary frame");
+    NS_WARN_IF_FALSE(!aFrame || !mPrimaryFrame || aFrame == mPrimaryFrame,
+                     "Losing track of existing primary frame");
     mPrimaryFrame = aFrame;
   }