There’s a new version of WordPress out now, 2.6.2, which addresses a database issue as well as the weakness of mt_rand(). This is especially important if you accept registrations to your blog. Also, some bug fixes, but other than the MySQL/PHP issue mentioned, this is another one of those small security releases. Check out the release post for more, and download the new version as well.
Thord Daniel Hedengren is a designer, writer, and blogger, and also the former editor of The Blog Herald. He used to be a hotshot in the gaming industry in Sweden, but sold everything and went International. Most recently he wrote a book called Smashing WordPress: Beyond the Blog, and does loads of kickass design.