[Distutils] Python 2.3/mingw32

What is this, and how can I get rid of it? cory@cory2k ~/cvs/Twisted $ python setup.py build -c mingw32 running build running build_py running build_ext error: Python was built with version 6 of Visual Studio, and extensions need to be built with the same version of the compiler, but it isn't installed. I had no problems building these extensions on Python 2.2 following the instructions at http://sebsauvage.net/python/mingw.html . I did the same thing substituting 2.3 for 2.2, and got the message above. Why doesn't it work any more? --compiler=mingw32 is still valid on the command line.