FYI ... there were 2000+ heldmsg-* files in /var/lib/mailman/data after the lists switch. I don't know how they came into existence. I checked the first couple of dozen and discovered they were all spurious, in the sense that going to the admindb web page for the list showed "empty" messages pending.
I knew for certain that no real messages in such abundancehad been pending that long (since April 6). So I decided life was too short and deleted everything for April 6-8. After that it jumped to real messages starting April 11. I saved them all in ~list/archive/heldmsg-after-move.tgz in case it somehow turns out to matter. k
