rem: .createInstance().QueryInterface(Components.interfaces.nsIURIChecker); 
add: .createInstance(Components.interfaces.nsIURIChecker); this.linkChecker.init(this.uri); 
context: function nsHeaderSniffer(aURL, aCallback, aData){  this.mCallback = aCallback;  this.mData = aData;    this.uri = makeURL(aURL);    this.linkChecker = Components.classes["@mozilla.org/network/urichecker;1"]    .createInstance().QueryInterface(Components.interfaces.nsIURIChecker);  var flags;  if (aData.bypassCache) {    flags = Components.interfaces.nsIRequest.LOAD_BYPASS_CACHE;  } else {    flags = Components.interfaces.nsIRequest.LOAD_FROM_CACHE;  }  this.linkChecker.asyncCheckURI(aURL, this, null, flags);}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/582bc3f22cb265ad001b3bfed757187347849f02/contentAreaUtils.js/buggy/xpfe/communicator/resources/content/contentAreaUtils.js