[Mailman-Users] bounce log: couldn't get list lock; endless queue

[NOW Website Coordinator]

Mailman seems to still be processing bounces from a mailing we sent 
out.  It's taking forever (days) and all unsubscribe/subscribe requests are 
piling up.  When I look at the bounce log, it says:

Mar 27 15:41:16 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:41:28 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:41:38 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:42:26 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:43:15 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:44:14 2003 (11742) now-summary: blah at blah.com residual bounce 
received
Mar 27 15:44:38 2003 (11742) now-summary: couldn't get list lock
Mar 27 15:44:50 2003 (11742) now-summary: couldn't get list lock

People trying to interact with the list are finding it timing out.  I've 
restarted it a few times, but to no avail.  qfiles/virgin has 10,000 files 
in it.

Every minute it does manage to get something done, like disable a 
member.  Or at least, I'm *just* receiving the email for it.  I *just* 
received this email related to this:
bounce:Mar 23 11:57:12 2003 (21655) now-summary: blah at blah.com disabling 
due to bounce score 5.0 >= 5.0

If I change the list settings NOW, will it stop notifying me about these 
old messages and speed up?