I used to work on the fastest computer in the house. ... which also happened to be the CAD file server for every other computer in the place.
Either XP or AutoCAD is in this instance, too damn smart for its own good.
I.e., setting up an xref to //CADserver/... automatically becomes C://... if you happen to be working on the CAD server.
So when I saved a drawing, and then someone else tried to work on it, AC couldn't find the xrefs, which were not on _their_ C: drive, so they had to fix the xrefs in order to see them.
No, I couldn't make the boss understand that the CAD server belonged in a closet. Not my problem anymore.
Mike Halloran
Pembroke Pines, FL, USA