can anyone explain me the following cut off of my mailman-errorlog?
it show up every 5 minutes and spam the log

thanks!
way
May 24 08:20:00 2005 gate_news(5861): Traceback (most recent call last):
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/cron/gate_news", line 274, in ?
May 24 08:20:00 2005 gate_news(5861): main()
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/cron/gate_news", line 254, in main
May 24 08:20:00 2005 gate_news(5861): process_lists(lock)
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/cron/gate_news", line 189, in process_lists
May 24 08:20:00 2005 gate_news(5861): mlist = MailList.MailList(listname, lock=0)
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/Mailman/MailList.py", line 101, in __init__
May 24 08:20:00 2005 gate_news(5861): self.Load()
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/Mailman/MailList.py", line 573, in Load
May 24 08:20:00 2005 gate_news(5861): dict, e = self.__load(file)
May 24 08:20:00 2005 gate_news(5861): File "/var/mailman/Mailman/MailList.py", line 546, in __load
May 24 08:20:00 2005 gate_news(5861): dict = loadfunc(fp)
May 24 08:20:00 2005 gate_news(5861): cPickle . UnpicklingError : ban_list is not safe for unpickling