add: accountManager.removeIncomingServerListener(gThreePaneIncomingServerListener); 
context: function OnUnloadMessenger(){  OnMailWindowUnload();}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/28dcf695a95be9747419fc0f97187bb3673ce566/msgMail3PaneWindow.js/buggy/mailnews/base/resources/content/msgMail3PaneWindow.js