From WordPress.org:
Version 2.5.1 of WordPress is now available. It includes a number of bug fixes, performance enhancements, and one very important security fix. We recommend everyone update immediately, particularly if your blog has open registration. The vulnerability is not public but it will be shortly.
In addition to the security fix, 2.5.1 contains many bug fixes. If you are interested only in the security fixes, you can download these corrected copies of wp-includes/pluggable.php, wp-admin/includes/media.php, and wp-admin/media.php. Replace your existing copies of these files with these new copies.
If you download the entire 2.5.1 release, you will be getting over 70 other fixes. 2.5.1 focuses on fixing the most annoying bugs and improving performance.
I’m downloading now and will be updating here shortly… I suggest you do, too!
UPDATE – WordPress 2.51 is installed and live… so far, no issues! Whoo!
I’m a huge fan of Counterize II, but the one thing I wish it did was keep better track of my unique hits, rather than just all hits. I was playing around with the plugin and, after figuring out how it called data, made some changes for it to show unique hit data in graph form, rather than just visitor data. See here: Before (this is what the standard plugin displays): 
After (you can see that my modded plugin displays all the Unique hit information before showing the standard info): 
If you’d like a copy of this plugin, just do the following (those currently using Counterize can skip to step 3):
- Download Counterize II (this was made from version 2.14.1)
- Install, activate, and configure the plugin.
- Backup your counterize.php file, and copy my modded version to the /plugins/counterizeii folder (after extracting it from the .zip file).
That’s it! Once you do that, if all went well, you will now have graphs showing all the Unique visitor data, rather than just the standard visitor data. Enjoy!! Please Note! This hasn’t been tested on any other blog other than my own, so buyer beware!
WordPress 2.5 (Final) has been released… go fetch it here:
WordPress 2.5
I shall be upgrading in just a few minutes! As usual, I shall edit this post once it has finished!!
EDIT - All done! The biggest change I see right away is the plugin page now has the Active Plugins shaded green and the inactive in white… I like that much more than the gray and white they had been playing with.
For all you testers out there, WordPress RC2 has been released! I shall be upgrading to it in about 5 minutes and expect everything should go as well as always. The good news in this release?
Finally with regards to theme and plugin compatibility, we’ve had no reports of any broken themes in this upgrade, which makes sense because we didn’t really change anything core about themes, just added new optional capabilities like Gravatars. Plugins that work with the admin may require updating to take advantage of the new, cleaner UI in WordPress 2.5.
Awesome! Anywho, the download can be found here: Screencast & WordPress 2.5 RC2. I’ll update this post once I upgrade! See you on the other side!
EDIT - We’re back and I see no issues so far! My “Insert Link” and “Insert Picture” boxes are back working once again (hooray!) and I like the “Toggle Kitchen Sink” feature:
All my plugins seem to be working fine with the exception of some of the features in HeadSpace (but he’ll just have to update, methinks). All in all, I’m lovin’ v2.5 a lot right now… go try it out if you haven’t yet!!
I’ve backed up my old WordPress database and decided to get a jump on testing out WordPress 2.5. While the front-end of the site looks pretty much the same, the back-end will take much more getting used to. Check out the details and screenshots here (also for those brave enough, download your own copy!):
WordPress 2.5 Sneak Peak
There are only a few things I’ve noticed that aren’t working. When making a URL, the link box is blank:
Also you might notice the “Visit Site” overlapping the “Write” button. This blank box also happens when trying to add an image. There’s a chance this is because of my browser, but I’m using FireFox 2.0.0.12 and that’s been pretty good to me. The only other issues come from plugins that haven’t been upgraded to work with 2.5, but there’s nothing to be done about that at the moment. Hopefully these issues will fix themselves by the final version, but beside that I’m impressed with all the good I see here!