WordPress 2.9.1 released.
Earlier this week WordPress 2.9.1 was released to fix some minor bugs found in release 2.9. It also fixes the annoying issue some bloggers faced with posts scheduling and pingbacks. It is always a good idea to keep your WordPress installation (and all plugins) uptodate, so I would strongly encourage you to upgrade to 2.9.1 as soon as possible.
You can upgrade directly from you Admin console or if you prefer you can download the latest version here.