anim_tk.py fails

In revisiting an old project, I tried the example

    > anim_tk.py. On two different WinXP machines, a "ghost"
    > window appears (can see right through it) and the following:

    > ------------------------------------
    > C:\Python23\Lib\site-packages\matplotlib\examples>python
    > anim_tk.py elapsed 10.7944733008 Fatal Python error:
    > PyEval_RestoreThread: NULL tstate

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

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

I'll have to take a look at this next week since I don't have access
to a win32 platform right now. It seems to be running fine on linux.

    > 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.

Thanks, it's great to hear encouraging words. Fernando and I will be
meeting tonight with some of the numarray and scipy folks, and so
hopefully we can come up with some more fruitful areas to make this a
great platform.

Now if only people could learn spell matplotlib <wink>

JDH