User blog comment:Dopp/Technical Update: April 26, 2011/@comment-1393830-20110427175825/@comment-1997905-20110427194116

In the case of AjaxRC (which prompted this), the problem isn't on our end - The enhanced changes file is named in such a way that the browser thinks the url is for a local file on the hard drive, and it attempts to load with the rest of the page every time the server returns a response. I don't think this is fixable with the JS on our end - at least, not as far as I know.