well crap...
Where do thumbnails live? I moved my movies off my /volume1/ to my /volume2/ and since I can't do it as a DVR storage path, I had to add it as a local content path. Now my library has 2 movie thumbnails. One dead and one that works. Where can I purge my thumbnails to get rid of all the duplicates? I don't mind clearing the issue outside of the program.