rem: url = pref.getComplexValue(urlPref, Components.interfaces.nsIPrefLocalizedString); 
add: url = pref.getComplexValue(urlPref, Components.interfaces.nsIPrefLocalizedString).data; 
context: function goClickThrobber( urlPref ){  var url;  try {    var pref = Components.classes["@mozilla.org/preferences-service;1"]                         .getService(Components.interfaces.nsIPrefBranch);    url = pref.getComplexValue(urlPref, Components.interfaces.nsIPrefLocalizedString);  }  catch(e) {    url = null;  }  if ( url )    openTopWin(url);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/6395bc7909d02cb3e72ec83e15c21bbcaff47d29/utilityOverlay.js/buggy/xpfe/communicator/resources/content/utilityOverlay.js