I downloaded and installed version 1.3-RC for WordPress MU this week. Download it here, if you want - - or wait for the final release to be coming soon!
Changes:
The main blog of the site doesn’t have to live at /blog/ if you’re using virtual hosts. #409
WordPress importer can now assign posts to other users. #435
The importer shouldn’t error on the foreach() loop when there’s only one author now #405
Privacy mode of new blog is stored properly. #423
Various cleanup patches by ktlee and momo360modena.
momo360modena gave the wpmu-* admin pages a nice facelift!
XMLRPC posting and the signup page are now disabled by default. They can be activated in the wpmu-options.php page. It is possible to change the xmlrpc setting for a particular blog by editing it via the wpmu-blogs.php page.
Individual blog’s upload quota can be edited on the edit blog page too.
Developers! get_blog_option() will never return the string “falsevalue” again. It will return the bool value false instead.
Version numbers look more like WP.org’s ones to aid plugin compatibility.
Misc bug fixes.
You can read more in the thread in the WordPress MU Support Forum
