[Mailman-Users] Traceback errors

[Dr. Jones]

Traceback (most recent call last):
  File "/usr/lib/mailman/cron/gate_news", line 43, in ?
    from Mailman import mm_cfg
  File "/var/lib/mailman/Mailman/mm_cfg.py", line 50, in ?
    DEFAULT_URL       = none
NameError: name 'none' is not defined

I am unsure how to rectify these errors, or why they are errors? 
Suggestions/

Scott

p.s. Mailman won't process my mail. I assume this is part of the reason.

-- 
Dr. Scott S. Jones
Hands-On Chiropractic 
IRC: irc.freenode.net #utah
Yahoo: sanchiro12