add:  return null; 
context: function FindInSidebar(currentWindow, id){	var item = currentWindow.document.getElementById(id);	if(item)		return item;	for(var i = 0; i < currentWindow.frames.length; i++)	{		var frameItem = FindInSidebar(currentWindow.frames[i], id);		if(frameItem)			return frameItem;	}}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/1179ca4df8b1dddc31272e5d75dec19b1a974f3a/msgMail3PaneWindow.js/buggy/mailnews/base/resources/content/msgMail3PaneWindow.js