WordPress 2.9.1 has just been released. After over a million downloads of version 2.9 and lots of feedback from users all over the world, they are finally releasing WordPress 2.9.1.
This release addresses a handful of minor bugs as well as a rather annoying problem where scheduled posts and pingbacks are not processed correctly due to incompatibilities with some hosting services. If any of these issues is affecting you, I suggest to give 2.9.1 a try. Download this release directly from their site or upgrade automatically from your dashboard (Tools -> Upgrade menu).