I've got a mailman service that was put in place by virtualmin and the archive doesn't work. I've been into the mailman settings for the relevant list and archive messages is set to yes, the archive is set to public and the new archive volume frequency is set to monthly. So all appears to be as it should. But trying to access the archive leads only to a folder of attachments. I've looked in /var/lib/mailman for the relevant list and that is a correct reflection of its contents. Other lists on this machine (and all other lists as far as I'm aware - there about 50) work just fine complete with archives. Distribution and other management functions for the listserve work fine.
I don't know where to look from here, ideas?