Problem with new Vista and os.system

[Arne Jamtgaard]

I'm getting myself set up on a new Vista box at work, and one of my
old scripts has stopped working.

Specifically, all calls to os.system return a -1. Whatever action I
was
asking os.system to run does not take place.

Is this a Vista thing, or perhaps just a wonky setting in my
environment.

Oh, python 2.5.

Arne