For those of you using WordPress 2.5 as your content management system, an important security update has just been released. This update includes one important security fix along with 70 other bug fixes and other enhancements. WordPress recommends everyone install this update, particularly those publishers who employ open registration.

You can download version 2.5.1 here

As a side note, to make your upgrading expereince much simpler and quicker, a plugin is available which automates the upgrade process.

The InstantUpgrade plugin downloads the latest WordPress version from the WordPress server and unpacks it at your server. In the next step, it deletes all of your old WordPress files (except wp-content/ and wp-config.php) and puts the new files into your WordPress directory. Finally, it runs the database upgrade script. That procedure is exactly what the official guide proposes, only 30 times faster and with you leaning back. I’ve used this method to upgrade to version 2.5 as well as the most recent 2.5.1 update. Both times, the total time it took to download and update my installation was under 30 seconds.

You can download the Instant Upgrade plugin here