I'm having trouble since I updated pro sites plugin to v3.21, and wp to v3.32.
Currently, with the pro sites v3.2.1:
1. When an Admin User clicks on any "plugin related" menu item he is taken to the profile page.
2. The majority of the menu items are not visible (for example: posts, pages, appearance, etc. are not visible on the menu)
3. If the Admin goes directly to /wp-admin/post-new.php, he is taken to the profile page.
So, it seems to be a permissions issue of some kind.
If I disable pro sites, the menu appears correctly and the Admin can access the site correctly.
I'm not sure what the conflict is, but I had to revert to pro sites version 3.2, which is working fine for me.