Well, there was no error. What happens is, the Cometchat bar is supposed to be fixed at the bottom of the browser window, but for some reason in IE it would not show at all, and the bg of it would sink to the bottom of the page. This happens only in IE. Once the file was deleted it seemed to work fine (but no rounded corners in IE). I can put you in touch with the Cometchat guy who was working on it if you like. I'll also send him a link to this post.