That could be a Windows thing, if someone messes with the users it’ll do weird things to My Documents. That folder’s stored uniquely for each user.
Are you logged in as someone different or some other weird thing? Does someone else have access to your machine to log in/out in Windows?
As cheap as CD-Rs are, I do daily backups on a per-project basis. I can fit a project’s AE files, Premiere files, audio, graphics, and batch lists all on one CD. I just throw the daily backups on a spindle. Cheapest insurance one can have, as I found out last Thanksgiving…motherboard blew a couple of capacitors with three major projects on my system. Agh.
Clint