The new release of wordpress is out. Upgrade your blog to the new version.

The most common reason of a blog getting hacked is due to fact that you are not updating your blog to the newest version of wordpress.

The new release has fixed around 750 bugs from the previous release.

To find out whats new in this version check the codex
http://codex.wordpress.org/Version_2.8

Note: You may be some plugins that are not yet compatible woth wordpress 2.8. So its advisable to copy your whole directory of wordpress using ftp