Comment 13 for bug 904410

Robie, here is the output of what you asked for:

root@Ubuntu-12:/home/tom# debconf-show mailman
  mailman/queue_files_present: abort installation
* mailman/default_server_language: en
* mailman/site_languages: en
* mailman/used_languages:
* mailman/create_site_list:

root@Ubuntu-12:/home/tom# stat /etc/mailman
  File: `/etc/mailman'
  Size: 4096 Blocks: 8 IO Block: 4096 directory
Device: 801h/2049d Inode: 9437691 Links: 3
Access: (0755/drwxr-xr-x) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2012-09-30 21:12:28.919605766 -0400
Modify: 2012-09-30 21:12:31.935672994 -0400
Change: 2012-09-30 21:12:31.935672994 -0400
 Birth: -

root@Ubuntu-12:/home/tom# stat /etc/mailman/mm_cfg.py
  File: `/etc/mailman/mm_cfg.py'
  Size: 4371 Blocks: 16 IO Block: 4096 regular file
Device: 801h/2049d Inode: 9438281 Links: 1
Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2012-09-30 21:12:31.975673885 -0400
Modify: 2012-09-30 21:19:05.364426238 -0400
Change: 2012-09-30 21:19:05.364426238 -0400
 Birth: -

root@Ubuntu-12:/home/tom# stat /var/lib/mailman/Mailman/mm_cfg.py
  File: `/var/lib/mailman/Mailman/mm_cfg.py' -> `/etc/mailman/mm_cfg.py'
  Size: 22 Blocks: 0 IO Block: 4096 symbolic link
Device: 801h/2049d Inode: 8264873 Links: 1
Access: (0777/lrwxrwxrwx) Uid: ( 0/ root) Gid: ( 0/ root)
Access: 2012-09-30 08:00:01.671370480 -0400
Modify: 2012-07-17 13:45:53.000000000 -0400
Change: 2012-09-19 01:30:21.539650246 -0400
 Birth: -

root@Ubuntu-12:/home/tom# grep DEFAULT_SERVER_LANGUAGE /etc/mailman/mm_cfg.py
DEFAULT_SERVER_LANGUAGE = 'en'
root@Ubuntu-12:/home/tom# grep DEFAULT_SERVER_LANGUAGE /var/lib/mailman/Mailman/mm_cfg.py
DEFAULT_SERVER_LANGUAGE = 'en'
root@Ubuntu-12:/home/tom#

Hope it helps.
Tom