At http://music.arts.uci.edu/crooksj/ I have a network running Advanced Access Manager. Currently Authors on the site are randomly being stripped of all capabilities. This is easily fixed using the AAM control panel, but why is it happening? How do I make it stop?
In addition, authors can post to any site in the network, even ones they are lot listed as users at, by manually changing the site URL.
This network is also running Unfiltered MU and used to have Multisite User Management, although it has been disabled for a long time.