I got the following error (or warning):
/var/lib/mailman/Mailman/Handlers/Scrubber.py:175: DeprecationWarning: get_type() deprecated; use get_content_type()
ctype = part.get_type(part.get_default_type())
Using Mailman from Ubuntu distrubityion
Mailman version 2.1.5
Python 2.4.3 (#2, Oct 6 2006, 07:52:30)