In revisiting an old project, I tried the example
On two different WinXP machines, a "ghost" window appears (can see right
through it)
and the following:


elapsed 10.7944733008
Fatal Python error: PyEval_RestoreThread: NULL tstate

This application has requested the Runtime to terminate it in an unusual
Please contact the application's support team for more information.

please embarrass me by pointing out that I've forgotten to install
something obvious.

BTW, It's not possible to say thank you enough times.
matplotlab/ipython/scipy is just a dream for scientific work. I also
add Maxima and Vpython (and TeX/LaTeX/ConTeXt) to my soup, fwiw.