Offline Files tries to sync someone else's files

My home directory is redirected to a DFS share
(\\domain\home\fileserver\username). Everything has been working swimmingly
until about a week ago when suddenly sync center started throwing errors. The
error is that it received an access denied when synching
\\domain\home\fileserver\some_other_user. "some_other_user" is always the
same user ID. The problem is, I never set the system up to sync anything for
that user, and this is a single-user system so nobody else did either. It
should not be trying to sync that directory at all.

In XP I could probably edit the registry and remove any partnership that the
computer believes it has with that directory, but in Vista I cannot find that
information in the registry. Does anyone know how to stop sync center from
thinking that it needs to sync with that directory?