Love this plugin, it's fantastic!
My current issue is that when I activate WP Document Revisions on a WordPress MU network, the Documents menu tab does not appear in the admin menu on the left for all users.
When I visit any subsite as a super admin, the Documents tab does appear, but regular administrators don't have access to Documents functionality on their own subsites. If I make a user a super admin, they can then see the Documents admin menu, so something odd is happening with the user roles in that only super admins have access to it when I activate it network wide.
I tried to read about it and fix it myself first, but I couldn't find anything except for some comments about that it should work network wide.
Two more notes that might help: 1) if I deactivate it network wide and then activate it on just the subsite, then the admin for that subsite can of course access document functionality.
2) I have tried this on two different WPMU installs - one with all other plugins deactivated - same result.