Windows 7: Backup skipped backing up ... as it is not on local machine.

Hi,

My Documents used to be redirected to a network location via GPO. GPO no longer redirects, and all documents have been copied back to the local machine. However, Windows Backup skips folders, saying these locations are still 'not on a local machine'. The folders are all subfolders of My Documents:

Windows backup results log:

Backup skipped backing up \\...removed...\My Documents\My Music as it is not on local machine.
Backup skipped backing up \\...removed...\My Documents\My Pictures as it is not on local machine.
Backup skipped backing up \\...removed...\My Documents\My Videos as it is not on local machine.
Backup skipped backing up \\...removed...\My Documents\My Pictures as it is not on local machine.

My suspicion is that the GPO redirection was not removed cleanly, but I've searched the registry and found nothing relevant (only Office MRU entries).

Thanks,
James