Security release for both WordPress 2.1.1 and 2.0.9 has been released. The WordPress version 2.1.1 includes about 30 bug fixes, mostly minor things around encoding, XML-RPC, the object cache, and HTML code.
Version 2.0.9 only includes the security update, which was around the code to prevent XSS. The WordPress team will continue providing security updates to 2.0 through 2010, but all new features and development will only be in the newer 2.1.
Note: This is a low-to-medium priority update recommended for all WordPress users. After the break is a list of changed files.
WordPress, WordPress 2.1.1, WordPress 2.0.9, Blog, Blogging