Delay morphing window when entering print preview mode.

b=126675; r=law; sr=alecf; a=asa

layout/xul/base/src/nsMenuPopupFrame.cpp

@@ -1501,6 +1501,11 @@ nsMenuPopupFrame::FindMenuWithShortcut(PRUint32 aLetter)
     immediateParent = this;
 
   nsIFrame* currFrame;
+  // NOTE: If you crashed here due to a bogus |immediateParent| it is 
+  //       possible that the menu whose shortcut is being looked up has 
+  //       been destroyed already.  One strategy would be to 
+  //       setTimeout(<func>,0) as detailed in:
+  //       <http://bugzilla.mozilla.org/show_bug.cgi?id=126675#c32>
   immediateParent->FirstChild(mPresContext, nsnull, &currFrame);
 
   while (currFrame) {

xpfe/browser/resources/content/navigator.xul

@@ -212,7 +212,7 @@ Contributor(s): ______________________________________. -->
           <menuitem id="printMenuItemToolbar" label="&printCmd.label;" accesskey="&printCmd.accesskey;"
                     default="true" oncommand="BrowserPrint()"/>
           <menuitem label="&printPreviewCmd.label;" accesskey="&printPreviewCmd.accesskey;"
-                    oncommand="BrowserPrintPreview();"/>
+                    oncommand="setTimeout(BrowserPrintPreview, 0);"/>
         </menupopup>
       </toolbarbutton>