[Mailman-Users] Anything to look out for in a 2.1.9 to 2.1.14-1 upgrade?

[Steve Burling]

Short version:

Are there any gotchas in upgrading from 2.1.9 to 2.1.14-1 that I need to
look out for?  I am, as usual in these cases, looking for the most expedient
way to fix a problem I've brought on myself.

Some more details...

We run the mailman processes on our mail server, a 64-bit Red Hat 5 machine
with python 2.4.3.  We run the web interface on our web server, which until
yesterday was a 32-bit Red Hat 4 machine with python 2.3.4.

Yesterday, we replaced the web server hardware with a 64-bit Red Hat 6
machine, which has python 2.6.6, and the web interface stopped working.
Delivery to lists is working just fine.  In the mailman error log, I see the
following:

Jan 16 09:53:30 2012 admin(13467):
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
admin(13467): [----- Mailman Version: 2.1.9 -----]
admin(13467): [----- Traceback ------]
admin(13467): Traceback (most recent call last):
admin(13467):   File "/opt/mailman/scripts/driver", line 94, in run_main
admin(13467):     pkg = __import__('Mailman.Cgi', globals(), locals(),
[scriptname])
admin(13467):   File "/opt/mailman/Mailman/Cgi/listinfo.py", line 27, in
<module>
admin(13467):     from Mailman import MailList
admin(13467):   File "/opt/mailman/Mailman/MailList.py", line 51, in
<module>
admin(13467):     from Mailman.Archiver import Archiver
admin(13467):   File "/opt/mailman/Mailman/Archiver/__init__.py", line 17,
in <module>
admin(13467):     from Archiver import *
admin(13467):   File "/opt/mailman/Mailman/Archiver/Archiver.py", line 32,
in <module>
admin(13467):     from Mailman import Mailbox
admin(13467):   File "/opt/mailman/Mailman/Mailbox.py", line 21, in <module>
admin(13467):     import mailbox
admin(13467):   File "/usr/lib64/python2.6/mailbox.py", line 18, in <module>
admin(13467):     import email.message
admin(13467): ImportError: No module named message

I'm trying to figure out if there's an easy way to fix this, that *won't*
break delivery to the lists.  Any hints much appreciated.