WordPress 1.5.1 has been released. I just did an “svn update” on my local WordPress tree and noticed the version.php file got updated to “1.5.1”. Before that it was an RC version and previous to THAT it was alpha. Here’s the post at the WordPress Development Blog:
It seemed like a good time to brighten everyone’s Monday with a new release of everyone’s favorite blogging software. We’re happy to announce the immediate availablity of WordPress 1.5.1 for free download. By our counter there were 207,981 downloads of 1.5.0 and we hope even more people will enjoy this latest release.
What’s new? Our crack documentation team has put together a short, technical changelog but to summarize this release has a ton of bug fixes, enhancements, and an important security fix. Plugin authors especially will love all the new API hooks and functionality we added to make advanced extensions to WordPress even easier. As a user you’ll find WordPress will run faster and make the world an even better place. Many thanks go out to our amazing testing and development team, who together squashed over 170 bugs!
With our new theme system in place upgrading should be a piece of cake: Just overwrite your old WordPress files and be careful not to delete anything important in your wp-content folder. There are more detailed upgrade instructions on the Codex if you need them.