rem: if (event.shiftKey) 
add: if (event && event.shiftKey) 
context: function MsgNewMessage(event){  var loadedFolder = GetFirstSelectedMsgFolder();  var messageArray = GetSelectedMessages();  if (event.shiftKey)    ComposeMessage(msgComposeType.New, msgComposeFormat.OppositeOfDefault, loadedFolder, messageArray);  else    ComposeMessage(msgComposeType.New, msgComposeFormat.Default, loadedFolder, messageArray);} 
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/b45cbb08806cde746797b655f4cb544518d50fc2/mailWindowOverlay.js/buggy/mailnews/base/resources/content/mailWindowOverlay.js