add: RemoveDirectoryServerObserver(null); RemoveDirectoryServerObserver("mail.identity." + currentIdentity.key); 
context: function ComposeUnload(){	dump("\nComposeUnload from XUL\n");	RemoveMessageComposeOfflineObserver();	msgCompose.UnregisterStateListener(stateListener);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c5f6c14b8a2578be56dd5770c9bb2523f3a411df/MsgComposeCommands.js/buggy/mailnews/compose/resources/content/MsgComposeCommands.js