I made the all-too popular mistake of renaming a title column and pushing out the changes via inheritance. I quickly reversed the change by renaming it back to Title. Now, when I use the Person or Group column type in a list or content type, the Check Names functionality doesn't work. It looks like one of the hidden fields that makes up the P or G type has been renamed from "Name" and is now "Title" which is causing my grief. Is there any way to reset the P or G type or rename just that field back to "Name"?
If your solution is truly what you need to accomplish you may be able to do this via powershell or the utility SharePoint Manager.
Who knew that after putting in 9 hours in on this it would only take 1 more hour to solve?