User-Agent:       Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.24 (KHTML, like Gecko) Chrome/11.0.696.12 Safari/534.24

Mailman can keep archives of messages sent. To do so it writes to files in /var/lib/mailman/archives/private/[listname] and [listname.mbox]. By default these directories are created when the newlist command is run with permissions root:apache:
==========================
[root@server3 private]# pwd
/var/lib/mailman/archives/private
[root@server3 private]# ls -la
total 16
drwxrws--- 4 mailman apache  4096 Mar 16 21:00 .
drwxrwsr-x 4 root    mailman 4096 Mar 16 20:59 ..
drwxrwsr-x 2 root    apache  4096 Mar 16 21:00 testlist
drwxrwsr-x 2 root    apache  4096 Mar 16 21:00 testlist.mbox
==========================

However this is wrong and prevents mailman from making any archives (/var/log/mailman/error):

==========================
Mar 16 04:00:28 2011 (13494) Archive file access failure:
        /var/lib/mailman/archives/private/testlist.mbox/testlist.mbox [Errno 13] Permission denied: '/var/lib/mailman/archives/private/testlist.mbox/testlist.mbox'
Mar 16 04:00:28 2011 (13494) Uncaught runner exception: [Errno 13] Permission denied: '/var/lib/mailman/archives/private/testlist.mbox/testlist.mbox'
Mar 16 04:00:28 2011 (13494) Traceback (most recent call last):
  File "/usr/lib/mailman/Mailman/Queue/Runner.py", line 120, in _oneloop
    self._onefile(msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/Runner.py", line 191, in _onefile
    keepqueued = self._dispose(mlist, msg, msgdata)
  File "/usr/lib/mailman/Mailman/Queue/ArchRunner.py", line 73, in _dispose
    mlist.ArchiveMail(msg)
  File "/usr/lib/mailman/Mailman/Archiver/Archiver.py", line 200, in ArchiveMail
    self.__archive_to_mbox(msg)
  File "/usr/lib/mailman/Mailman/Archiver/Archiver.py", line 169, in __archive_to_mbox
    mbox = self.__archive_file(afn)
  File "/usr/lib/mailman/Mailman/Archiver/Archiver.py", line 157, in __archive_file
    return Mailbox.Mailbox(open(afn, 'a+'))
IOError: [Errno 13] Permission denied: '/var/lib/mailman/archives/private/testlist.mbox/csa-chapters.mbox'
==========================

changing ownership to mailman:apache of the directories in /var/lib/mailman/archives/private corrects the issue as the mailman processes (which run as mailman) can now write to the directories. 



Reproducible: Always

Steps to Reproduce:
1. Install mailman
2. create newlist
3. enable archiving of messages
4. send message. fails to archive due to permissions.
Actual Results:  
no archives.

Expected Results:  
message gets archives