Hi Peter. Things were working great with the plugin for us on both M.S. installations and single site installations, but I recently learned that (at some point) as I upgraded to more recent versions of WP (separately to 3.32 and 3.4 on different sites), the plugin stopped working on MS installs.
It seems to manifest in two ways:
1. The admin menu normally available at "Users > Avatars" simply does not show.
2. Also, if I try to manually go to it at "/wp-admin/users.php?page=avatars.php" ... I get an error saying "You do not have sufficient permissions to access this page." This happens when I go as site admin and even when I go as super admin.
This is happening on MS installs on both 3.32 and 3.4, but I have single install where it still works fine.