I just ran through the upgrade cycle of WordPress MU 2.7.1 to 2.8.4a and noticed two things:
1) When I logged into wp-admin, I noticed that it didn't ask to upgrade the database. Going to wp-admin/upgrade.php said that no updates were required. Is this expected? My local WordPress guru said that it was unusual.
2) I saw earlier that there was supposedly a fix for plugins being activated sitewide not actually being activated sitewide. I assumed this was fixed as stated by the developers. Apparently, it is NOT fixed because I had to run my script to copy the active plugins option from the root blog to all the other blogs in our MU install.
Side note: Why is WordPress MU 2.8.4a not an option in the version dropdown when posting topics?