rem: if (!aEvent) return; 
add: if (!aEvent) return; 
context: function MsgGetMessagesForAccount(aEvent){    if (!aEvent)        return;    var uri = aEvent.target.id;    var server = GetServer(uri);    GetMessagesForInboxOnServer(server);    aEvent.preventBubble();}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/a5014eeb9603f1fcb5a28bfecb6ff6bcc4ee3e1e/mailWindowOverlay.js/buggy/mailnews/base/resources/content/mailWindowOverlay.js