Something is remembering state where it shouldn't, and
> after a call to savefig() with an eps extension, further
> pngs are clobbered into eps. Is this a misuse of the
> library on my part? I read the savefig docstring, and I
> don't see an error in my usage.
Gee, I'm starting to get the feeling your the first person who's every
actually *used* matplotlib 
I'll look into it...
JDH