add:  InlineSpellCheckerUI.enabled = false;  
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/2007_temp/2007/10234/f6094be94ba3d9b15ce02502ac68ed6af2c6284b/MsgComposeCommands.js/clean/mail/components/compose/content/MsgComposeCommands.js