add:   StopInlineSpellChecker(); 
context: function ComposeUnload(){  dump("\nComposeUnload from XUL\n");  EditorCleanup();  RemoveMessageComposeOfflineObserver();  RemoveDirectoryServerObserver(null);  if (gCurrentIdentity)    RemoveDirectoryServerObserver("mail.identity." + gCurrentIdentity.key);  if (gCurrentAutocompleteDirectory)    RemoveDirectorySettingsObserver(gCurrentAutocompleteDirectory);  if (gMsgCompose)    gMsgCompose.UnregisterStateListener(stateListener);  if (gAutoSaveTimeout)    clearTimeout(gAutoSaveTimeout);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/b6fcd2c14cbdf7ebd65647741a23c940dea6a754/MsgComposeCommands.js/buggy/mailnews/compose/resources/content/MsgComposeCommands.js