[support] Permissions Shot After Upgrade To 5.7

I just upgraded a site to 5.7 this weekend, and all my access permissions are hosed. I followed all the instructions for doing the upgrade as best I can tell. I've tried re-saving everything, but nothing seems to work. For instance, I"m using Menu Per Role to control access to some menu items,and restricting them to certain roles. Now, however, the menu items are visible to the anonymous user, which is not good for the organization. I've tried re-saving all the settings, but to no avail. I'm having similar issues with menu items for views, where they are restricted to certain roles. How do I go about fixing this?

Thanks.

Steve