The mailbox_transport feature was broken on 20000625 (resulting in "unknown
user" errors) and was fixed on 20001116.
glibc22 patch not needed after snapshot 20001005. (I think.)
20001217 fixes ldap timeout problems. (and some mysql problems) FWIW, I
don't feel comfortable using an earlier release with ldap.
I've built 20001217 earlier today.