[Mailman-Users] 2.1a4 approving users not working

[mailman]

I have a problem with my installation of 2.1a4:

I have created a test list which requires confirmation and approval to
add users. New users can fill out a form ok and receive the first email.
After they confirm they are added to the pending requests and the list
admin is notified.

Going to the admin page gives the 4 options: defer, approve, reject,
discard but only reject (and defer) work. Approving or discarding
gives a report that the database is updated and sometimes returns a
screen with the new user apparently processed because they are not
listed. On refreshing the page however they re-appear. No email is sent
confirming the subscription if approved.

Mandrake 8.1 is the base system
Postfix  is the MTA and specified in the Mailman config
I've tried Python 2.1.1, 2.1.2 and 2.2. I sometimes see errors
complaning about a different linked library with bsddb3 (ie from
bin/genaliases)

I guess this is an installation/compatability problem rather than a bug
as I haven't seen any reports of ay similar problems. Anyone got any
ideas please?

-- 
Colin Mackinlay