Missed a file.

layout/xul/base/src/nsPopupSetFrame.cpp

@@ -519,14 +519,16 @@ nsPopupSetFrame::MarkAsGenerated(nsIContent* aPopupContent)
     nsCOMPtr<nsIContent> childContent;
     mContent->ChildAt(i, *getter_AddRefs(childContent));
 
-    // Retrieve the menugenerated attribute.
-    nsAutoString value;
-    childContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::menugenerated, 
-                               value);
-    if (value == NS_LITERAL_STRING("true")) {
-      // Ungenerate this element.
-      childContent->UnsetAttribute(kNameSpaceID_None, nsXULAtoms::menugenerated,
-                                   PR_TRUE);
+    if (childContent.get() != aPopupContent) {
+      // Retrieve the menugenerated attribute.
+      nsAutoString value;
+      childContent->GetAttribute(kNameSpaceID_None, nsXULAtoms::menugenerated, 
+                                 value);
+      if (value == NS_LITERAL_STRING("true")) {
+        // Ungenerate this element.
+        childContent->UnsetAttribute(kNameSpaceID_None, nsXULAtoms::menugenerated,
+                                     PR_TRUE);
+      }
     }
   }