A Simpler Ajax Path
Subject:   Using overrideMimeType with text files causes errors
Date:   2005-10-09 02:57:41
From:   parsingphase
Using http_request.overrideMimeType('text/xml'); when you're not actually fetching XML is incorrect, and will cause confusing Javascript Console errors in the latest versions of Firefox. The XMLHttpRequest object will try and parse the fetched file as XML, and complain when it can't.

(Mozilla bug 311724)