I can\'t find this in the archives. Is there something not right with mingw/msys? [I need to get vcvarsall.bat fixed, so I can install other packages.]
Failure to in
This is likely a bug with Python. See http://bugs.python.org/issue2698
Meanwhile, you could install ActivePython and install Twisted via PyPM (no compilers needed).
Alternatively, you can use the official binary ... though I recommend the aforementioned solution as you can easily 'upgrade' to newer versions of Twisted in future.