rem: feed.downloadCallback.onProgress(event.position, event.totalSize); 
add: feed.downloadCallback.onProgress(feed, event.position, event.totalSize); 
context: Feed.onProgress = function(event) {  var request = event.target;  var url = request.channel.originalURI.spec;  var feed = gFzFeedCache[url];  if (feed.downloadCallback)    feed.downloadCallback.onProgress(event.position, event.totalSize);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/90367c03b4b5645e91e5b66d843a1b805523378d/Feed.js/buggy/mail/extensions/newsblog/content/Feed.js