Site Error File Does Not Exist

I used http://site-perf.com/ to test the speed of my site (http://sweatingthebigstuff.com) and it shows one file that gives a 404 error. That file does not exist (hence the error), but h开发者_如何学Goow do I found out how to fix it? I don't know where it is being called (definitely not in the code).

The file in question is:

sweatingthebigstuff.com/wp-content/themes/WillTech_5_3_2010/lib/images/icon-rss.gif

I assume that I used to have a file but since deleted it. It was in a widget and it is now pointing to a png file.

Any ideas?

It was in a widget and it is now pointing to a png file.

There is a reference to it somewhere - in a forgotten HTML file, in a style sheet.... The easiest might be doing a full-text search for your whole (local) Wordpress directory for icon-rss.gif.

If that doesn't turn up anything - it should, though! - try using a downloader like GetLeft to fetch a full HTML copy of your site, and do a full text search on that. That should at least show you which page the offending line is on.