WordPress 2.8.5 was released a few days ago. I have successfully upgraded mine a couple of minutes ago. It only took me less than a minute using the WordPress auto update function. This version is considered as a security upgrade thus is very important for all blog owners running on WordPress platform to perform the upgrade.

Here are the summary of changes in the 2.8.5 version:

• Fix the Trackback Denial-of-Service attack.
• Removal of areas within the code where php code in variables was evaluated.
• Switched the file upload functionality to be whitelisted for all users including Admins.
• Retiring of the two importers of Tag data from old plugins.

The upgrade files can be downloaded here.