[Mailman-Users] delivery hangs

[Marco Bellini]

sometimes a message in the qfiles dir hangs the system.
this is the log

Oct 07 12:55:31 2002 qrunner(20485): Traceback (innermost last):
Oct 07 12:55:31 2002 qrunner(20485):   File
"/usr/local/mailman/cron/qrunner", line 283, in ?
Oct 07 12:55:31 2002 qrunner(20485):      kids = main(lock)
Oct 07 12:55:31 2002 qrunner(20485):   File
"/usr/local/mailman/cron/qrunner", line 253, in main
Oct 07 12:55:31 2002 qrunner(20485):      keepqueued =
dispose_message(mlist, msg, msgdata)
Oct 07 12:55:31 2002 qrunner(20485):   File
"/usr/local/mailman/cron/qrunner", line 157, in dispose_message
Oct 07 12:55:31 2002 qrunner(20485):      mlist.ParseMailCommands(msg)
Oct 07 12:55:31 2002 qrunner(20485):   File
"/usr/local/mailman/Mailman/MailCommandHandler.py", line 123, in
ParseMailCommands
Oct 07 12:55:31 2002 qrunner(20485):      precedence = msg.get('precedence',
'').lower()
Oct 07 12:55:31 2002 qrunner(20485): AttributeError :  'string' object has
no attribute 'lower'

i'm running mailman 2.0.12
can anyone help me?

thx
m.