I am running Python 2.5.2 on win xp sp3 on an Intel Core2 Duo. After
installation of matplotlib-1.0.0.win32-py2.5.exe I get a Windows crash
on importing pylab.
import pylab -> An unhandled win32 exception occured in python.exe 
import matplotlib works
I did not add anything to the matplotlibrc. I uninstalled matplotlib
and re-installed with the same problem.
matplotlib-0.99.3.win32-py2.5.exe gives me the same problem.
The older version I had installed before (forgot which one) worked fine.