When I try to access a FeedBurner feed from my Flex app, FeedBurner decides to hand me an HTML version of the feed, instead of, you know, the frickin' feed. Of course, if I go to the same URL in Firefox, it gives me the right thing. What do I have to do to get FeedBurner to realize that I actually want XML?
[Addendum: I know I can append "?format=xml" to the URL, and I guess I could just automatically add that onto any URLs I get from FeedBurner. But if I go to the base URL from Firefox, FeedBurner knows how to hand it XML; I want to figure out how it's doing that, so my feedreader will work with other sites that try to do the same trick (I've noticed at least one other site doing it).]