add:   lastTreeChildrenValue = null; lastTreeChildren = null;  
context: function SetUpTree(forceToServer){	//dump("SetUpTree()\n");	SetUpRDF();		gStatusBar = document.getElementById('statusbar-icon');	gSubscribeTree.setAttribute('ref',null);	if (!gServerURI) return;	var folder = GetMsgFolderFromUri(gServerURI);	var server = folder.server;	try {		gSubscribableServer = server.QueryInterface(Components.interfaces.nsISubscribableServer);		gSubscribableServer.subscribeListener = MySubscribeListener;		gStatusFeedback.ShowProgress(0);		gStatusFeedback.ShowStatusString(Bundle.GetStringFromName("pleaseWaitString"));		gStatusBar.setAttribute("mode","undetermined");		gSubscribableServer.populateSubscribeDatasource(msgWindow, forceToServer);	}	catch (ex) {		dump("failed to populate subscribe ds: " + ex + "\n");	}}
meta: 5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5459/d2b9d3d09da4baad6ad3dd7f1bb40611ab34bc47/subscribe.js/clean/mailnews/base/resources/content/subscribe.js