rem: var windowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService(); 
add: var windowManager = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService(); 
context: function GetWindowMediator(){    if (gWindowManagerInterface)        return gWindowManagerInterface;    var windowManager = Components.classes['@mozilla.org/rdf/datasource;1?name=window-mediator'].getService();    return (gWindowManagerInterface = windowManager.QueryInterface(Components.interfaces.nsIWindowMediator));}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/58ad7ad612cf759624c52f8d3473225eb3ce4026/mailWindowOverlay.js/clean/mailnews/base/resources/content/mailWindowOverlay.js