rem: if (feed.downloadCallback) feed.downloadCallback.onProgress(feed, event.position, event.totalSize); } 
add: if (feed.downloadCallback) feed.downloadCallback.onProgress(feed, aEvent.position, aEvent.totalSize); }, 
context: Feed.onProgress = function(event) {  var request = event.target;  var url = request.channel.originalURI.spec;  var feed = FeedCache.getFeed(url);  if (feed.downloadCallback)    feed.downloadCallback.onProgress(feed, event.position, event.totalSize);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/76e4a398a03fb70f86d00c1c70159ad4c96e647d/Feed.js/clean/mail/extensions/newsblog/content/Feed.js