We are experinencing an issue in our new Sharepoint 2010 Production environment.
In our environment we use a very simple security hierarchy, with each site consisting of an Owners (full control), Members (contribute), and Visitors (read) group. Everything has been moving along smoothly with site owners administering their various site group memberships until late last week some of our site admins reported that they have lost the ability to get into any of their site permissions groups to add or remove members.
Using their credentials I was able to re-create the error on my PC (see SP2010-Permission-error.jp
g). The site owners permissions are configured correctly, and when I run a verify permission against the site it correctly recognizes that the user has full control delegated through the site Owners Group. Also the groups themselves are owned by the Site Owners Group and just to be sure I gave ownership of these groups to a named site admin but still no luck.
As a site collection admin I can still access these groups without issue.
At this point I am a bit stumped and am curious if anyone has seen a similar issue in the past. Any help would be much appreciated.