Well, I just noticed this in my logs after I re-loaded the latest Dovecot config I tried:

Jan 13 15:09:45 mail dovecot: SIGHUP received - reloading configuration Jan 13 15:09:45 mail dovecot: read(imap dump-capability process) failed: Interrupted system call Jan 13 15:09:45 mail dovecot: Invalid configuration, keeping old one Jan 13 15:09:45 mail dovecot: child 2085 (unknown) returned error 82 (Internal logging error)

It's apparently been doing this every time I've reloaded the config, so this is probably why none of my changes with the ACLs are working. :/
Any thoughts on what could be causing this kind of error?? Does that error just basically mean something's set wrong somewhere in dovecot.conf?

David