add:  gFzFeedCache[url] = ""; 
context: Feed.onDownloadError = function(event) {  var request = event.target;  var url = request.channel.originalURI.spec;  var feed = gFzFeedCache[url];  if (feed.downloadCallback)    feed.downloadCallback.downloaded(feed, kNewsBlogRequestFailure);}
meta: 5872	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/5872/73e6ee2aab97199bb44b2a333d1324dc47d9bb78/Feed.js/buggy/mail/extensions/newsblog/content/Feed.js