I just spent about two hours trying to figure out what I did wrong. I wrote a new plugin that relies on the Post Levels doing its thing. Well it turns out that with WordPress version 2.1.1 it works fine, but with version 2.1.3, not so much. (Version 2.1.2 is to be avoided for other reasons, by the way). So if you’re using Post Levels, which I love, do not upgrade your WordPress all the way to version 2.1.3 — I do recommend upgrading, but only to version 2.1.1.

The problem, by the way, is that with WP 2.1.3, any logged-in user can see your most private posts, not just those users of the designated level. This is a pretty serious, so do be careful.

Oh, and you can downgrade WordPress from version 2.1.3 to version 2.1.1, so if you’ve already installed the latest version, all is not lost.