> So, whatever is going wrong on test_Cluster.py seems to be
> specific to
> Windows (XP) and Python 2.6 - and possibly just my Windows
> development
> machine.
>
I believe that the problem is that msvcr90.dll is missing. This is the C runtime from Microsoft. Earlier Pythons used msvcr71.dll, if I'm not mistaken.
--Michiel