I changed the username in Active Directory for the administrator who set up most of our Sharepoint 2010 server and now neither she nor I (as domain admin) can manage library settings, services on farm, or a number of other places where apparently sharepoint
relies on user profile sync to succeed to grant privileges. Checking back in the logfiles, it would appear that sharepoint profile sync hasn't been working since the last cumulative update but no one noticed (I don't adminster the server) until the sharepoint
admin user person got married and their username (and display name) changed. Since then, many links are broken in both central admin and all other sites. The error is always the following (the date/time changes obviously): "