Code:
====================== 8< =====================
from distutils.core import setup
setup(..., classifier=('Intended Audience :: 
Developers', 'Environment :: Console :: 
Curses'), ...)
====================== 8< =====================

The query: "./setup.py register" will create HTML 
request:
----------------GHSKFJDLGDS7543FJKLFHRE75642756743254
Content-Disposition: form-data; name="classifiers"

('Intended Audience :: Developers', 'Environment :: 
Console :: Curses')

Instead of a multipart part for each value.

====

The bug is stupid, see attached patch.

Haypo