There is a chance that the file got corrupted in the move, but the likely
cause is that the PC has not been updated to Service Pack 1 (SP1). On the
PC, start PowerPoint, go to the Help menu, choose Check for Updates, and
follow the instructions to install SP1.
--David

Signature
David M. Marcovitz
Microsoft PowerPoint MVP
Director of Graduate Programs in Educational Technology
Loyola College in Maryland
Author of _Powerful PowerPoint for Educators_
http://www.loyola.edu/education/PowerfulPowerPoint/
> I am using Office 2004 on a Mac running OS X 10.4 and after editing
> the PPT (originally created on an XP machine in Office 2003), I cannot
[quoted text clipped - 3 lines]
> Thanks
> -David