Looks like wordpress has an off-by-one-date bug regarding Rewrite rules for the /feed URLs. I’m not sure what it is, nor am I going to track it down, but it is present.

Without this post, the rss feed fails. With this post, it works. It has to do with today’s date and how wordpress does a Rewrite rules, as going straight against the PHP script works, using the mod_rewrite action does not.

Weird.

[Update 6/1: Looks like I had hand patched a bug that should have brought me up to 1.5.1.1 but there was still a lingering feed problem. In any case, I just upgraded to 1.5.1.2 and the feed appears to be back and working properly.]