[Mailman-Users] New install - Permission denied error

[Fleetwood, Cassandra (AZ75)]

After installing Mailman I receive the following message, one per minute.

Traceback (most recent call last):
  File "/home/mailman/cron/qrunner", line 275, in ?
    lock.lock(timeout=0.5)
  File "/home/mailman/Mailman/LockFile.py", line 219, in lock
    self.__write()
  File "/home/mailman/Mailman/LockFile.py", line 350, in __write
    fp = open(self.__tmpfname, 'w')
IOError: [Errno 13] Permission denied:
'/home/mailman/locks/qrunner.lock.incose.propagation.net.6397'
Exception exceptions.OSError: <exceptions.OSError instance at 81cc2c8> in
<method LockFile.__del__  of LockFile instance at 8292c18> ignored
-----------------------------------

Configure was run as follows:
./configure --with-mail-gid=mail --with-cgi-gid=nobody
-----------------------------------

Permissions on mailman install directory:
drwxrwsr-x  18 mailman  mailman      1024 Nov 17 23:29 mailman/
-----------------------------------

I have followed the install instructions (multiple times), and can't find
the problem.
>From my search of the mail-users archives, I thought the issue might be the
settings for --with-mail-gid and/or --with-cgi-gid, but I don't see a
problem with these. I'm new to Linux and Mailman, so I could be wrong.
I appreciate any help.
 
Cassandra.