[Mailman-Users] disable subject_prefix, and log location

I want to create lists that have a null subject_prefix. When I do so, my messages seem to disappear into the ether. How can I set this?

On, another topic, where are the logs for mailman, other than /var/spool/mailman/logs/*? Postfix claims it delivered a message to ("|/usr/local/lib/mailman/mail/mailman post testlist"), but I see no record of any such message in /var/spool/mailman/logs/*

-- Not only is this incomprehensible, but the ink is ugly and the paper is from the wrong kind of tree. -- Professor W., EECS, George Washington University