Out of Memory? MacPro

I keep getting some very annoying problems with a colleague sending me powerpoint presentations.. that I can't open on my new mac book pro!

seems rather random also:

2.7Mb files (sent from ubuntu, but in ppt format) show a

Import Error - Out of Memory

message

When (some) are lowered to 2.6Mb they seem to work

but others don't.

I've shut down everything, re-started computer, etc. ... same prob.


I thought mac pro was the tops in memory management .. how can it get stuck with something like this??


help!

thanks

Stella

sending by email or via skype has exactly same effect