rem: var msgFolder = GetMsgFolderFromUri(selectedFolder); 
add: var msgFolder = GetMsgFolderFromUri(selectedFolder, true); 
context: function GetFirstSelectedMsgFolder(){    var selectedFolder = gActionTargetElement.getAttribute("uri");    var msgFolder = GetMsgFolderFromUri(selectedFolder);    return msgFolder;}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/80c62d7732b41acb69745f4ab7716700077b69df/FilterEditor.js/buggy/mailnews/base/search/resources/content/FilterEditor.js