We’ve done a little bit of work to try getting the RSS feeds working properly. It would, however, be helpful to have more data. We have resynced, we have repinged it from Feedburner, and we fixed a warning that showed up on the feed validator (turns out that WP2.0 comes out of the box with an out of date bit of markup: wfw:commentRSS should be wfw:commentRss, and you fix it in wp-rss2.php).
If you got this post via RSS, what feed were you using? Atom, RSS 1, RSS 2, via Feedburner’s link or direct, and with what reader?
If you didn’t get this post via RSS and should have, same questions!
Edit: Well, for whatever reason, the URLs www.raphkoster.com/feed, /feed/atom, /feed/rss, and /feed/rss2 were non-functional, redirected to the front page. So readers of course saw that as malformed RSS. A bit of .htaccess voodoo seems to have fixed it, but I still don’t know why those URLs didn’t work by default, given that www.raphkoster.com/wp-rss.php and /wp-atom.php and /wp-rss2.php worked fine.
Anyway, all of those now redirect to FeedBurner as well, so everything should (cross your fingers) be working right.