Apparently there is a situation where importing PyOpenGL
can raise a fatal Python error with the message "Fatal
Python error: Can't import module 'numarray.libnumarray'".
This may be due to an installation problem with numarray (I
haven't tried to repeat this), but the fatal error is a definite
no-no: the import of PyOpenGL should fail at worst.
The problem of the fatal error becomes serious when using
the MacPython Package Manager, an automated package
installation tool: as soon as this situation has occurred once
Package Manager no longer runs, because it tries to obtain
the PyOpenGL version number at startup. So the poor end
user also has no way of figuring out what is going on...
And because of the fatal error there is also no workaround I
can do in Package Manager itself.