rem: messenger.SetWindow(window,null); 
add: messenger.SetWindow(window, null); 
context: function LaunchUrl(url){  var messenger = Components.classes["@mozilla.org/messenger;1"].createInstance(Components.interfaces.nsIMessenger);  messenger.SetWindow(window,null);  messenger.OpenURL(url);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/2a05bc5c94a07b116df34ee0bc51707b5d4b9c94/addressbook.js/buggy/mailnews/addrbook/resources/content/addressbook.js