[Mailman-Users] Membership reminder sent to non-subscriber

[Bertha]

I've got an odd problem, which I haven't found duplicated in the archives.  
A former subscriber to a mailing list unsubbed, but is still getting the 
monthly membership reminder notices.  I've checked to make sure he is, in 
fact, removed from the list membership (he is).  He isn't getting the list 
messages, just the monthly membership reminders.

Has anyone else encountered this problem, or know what might be causing 
it?  We're running version 2.1.5 on a Linux box (i686 
kernel ver. 2.4.21-27.0.4.EL).

-Bertha
-- 
No, nurse!  I said remove his SPECTACLES!