WordPress MU version 2.9.1 has just been released.
This is probably the last release before it is merged into WordPress 3.0 as the merge has already started!
Anyway this release brings the new features and bug fixes of WordPress 2.9 and 2.9.1 into WordPress MU. My favourite new feature has to be the Trash can, but there’s also an image editor, plugins can be bulk updated and video embeds are easier to do.
If you have more than a few dozen blogs, be sure to add the commentmeta table first before upgrade.
Thank you to everyone who has helped make WordPress MU better over the years, either by helping on the forums, writing plugins, contributing code, working on Trac tickets or any of the other hundred and one other things that go into an open source project.

33 Comments
Andrea_R (7 comments.) on January 14, 2010 at 2:22 pm.
Thank you so much for starting it.
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donnacha | WordSkill (27 comments.) on January 14, 2010 at 3:19 pm.
Donncha, thank you so much, MU has been an essential part of my day-to-day work.
Jeffro (1 comments.) on January 14, 2010 at 3:36 pm.
Congrats on this milestone although I think for you it is bittersweet. What will your role be after the code bases have merged together? Will you still be leading the charge behind the multi-site functionality part of WordPress?
John Turner (1 comments.) on January 14, 2010 at 3:39 pm.
Very nice work!
mercime on January 14, 2010 at 3:56 pm.
Thank you very much. My first exposure to world of WP was via WPMU install and it continues to be a blast. You are awesome, and that’s no blarney.
Slà inte. Cheers.
Ünsal Korkmaz (3 comments.) on January 14, 2010 at 4:09 pm.
thanks for this
Jeff Carter (1 comments.) on January 14, 2010 at 4:16 pm.
Yes, thanks so much for working on this. It will be nice to have the new 2.9 features in our new site.
Patrick (1 comments.) on January 14, 2010 at 4:25 pm.
Donncha ROCKS!
Trace (2 comments.) on January 14, 2010 at 5:25 pm.
Thank you for your hard work and the time you’ve committed to MU and WP in general. You could have been outside flying a kite on many a day and instead you were hard at work on MU, thank you!
kilwag (1 comments.) on January 14, 2010 at 8:34 pm.
I can’t express how excited I am about The Merge, although I suppose a trip to your Amazon wish list would help me… Thanks for changing my world as a publisher!
Kiks (1 comments.) on January 14, 2010 at 8:47 pm.
wordpress mu rocks , I am a new user and love it.
Matt Lincoln Russell (1 comments.) on January 14, 2010 at 8:50 pm.
Outstanding! Thank you.
charlie (11 comments.) on January 14, 2010 at 9:10 pm.
hmm, what is this? What is the text?
siteurl ); ?>wp-admin/wpmu-edit.php at line 439
Flavio Paiva (1 comments.) on January 15, 2010 at 1:11 am.
Doncha, I love this work.
Congratulations!
Johnny Canuc (1 comments.) on January 15, 2010 at 1:59 am.
Thanks to everyone who worked on MU, I really love the idea of it from a website administrators point of view. And I must admit that WordPress 3.0 sounds pretty exciting, especially now that the MU project will be rolled into it.
Mark (1 comments.) on January 15, 2010 at 3:55 am.
I am in the process of redoing a major site to be powered by WPMU. Once redone, it will be a pride of WPMU to have this one powered by it.
BTW, when are you going to fix your menu so it doesn’t look broken in IE?
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Cath on January 17, 2010 at 11:53 pm.
Hooray hooray hooray
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James Sloane (1 comments.) on January 19, 2010 at 6:26 pm.
I am an avid wordpress user. I always wanted to build an MU site with buddypress installed. Since wordpress 3 is coming out with mu rolled into it … would it make more sense to wait till 3.0 comes out and start then or will i be able to upgrade WPMU 2.9 to wordpress 3.0? I really want to get started … but i could wait (in theory
)
Ovidiu (9 comments.) on January 23, 2010 at 6:07 pm.
Just curios about the embeds: does wpmu now have the same embed features as wordpress introduced in 2.9?
Meaning I can now retire Viper’s Video Quicktags?
Or does wpmu still behave more conservatively than sigle wp?
Simone Fumagalli (1 comments.) on January 28, 2010 at 2:17 pm.
Well. I had some problem with the “Expire” headers for the images.
After a bit of searching I’ve found that in blogs.php at line 91 there is
@header( ‘Expires: ‘ . gmdate(‘D, d M Y H:i:s’, time() + 100000000) . ‘ GMT’ );
Why you have added this ? Wouldn’t it be better to leave the Expire header under the control of Apache ?
I love WPmu
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