I had configured the User Profile Service and all was working well (Syncing with AD etc.). However, something has gone wrong.
The services still appear to be running; both Forefront Identity Manager services are running, and the services show as 'Started' in Central Administration. The 'My Profile' and 'My Site' options have disappeared though, and browsing to the My Sites page
results in an error (Could not load user profile).
To make matters much worse, it seems to have also broken the Central Administration site. If I try and go to 'Manage Service Applications' I get another error (The specified user or domain group was not found). This error seems to come up on around
half of the pages on the Central Administration site. Looking up the error (abb6b174-0f71-413a-a27a-41cdc87b66d0) in the logs I find this:
09/06/2010 15:35:45.44 w3wp.exe (0x0868) 0x06A0 SharePoint Portal Server
User Profiles cm6y High User Profile Application Proxy failed to retrieve partitions from User Profile Application: Microsoft.Office.Server.UserProfiles.UserProfileA
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