Color 0 weirdness

[Gat <Gat@ai.jpl.nasa.gov>]

   Subject:      Color 0 weirdness
I have a program which draws color pictures that works fine on my machine. 
When I move it to a different machine, everything works except color 0 shows up
as bright red instead of black.  Same code.  Same version of MACL (1.3.2). 
Does anyone have any idea as to what might be going on?

Thanks,
Erann "I hate weirdness" Gat