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: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/aa8a1eb738bbd6014d4141d9a9c33b94d5cc6e43/FilterEditor.js/buggy/mailnews/base/search/resources/content/FilterEditor.js