I have a SuSE 10.0 Master running 2.3.11 (from the RPMS at ftp://ftp.suse.com/pub/projects/OpenLDAP/2.3/i386/10.0) and a syncrepl slave on a busy mailserver (also SuSE 10.0/2.3.11), and configured Postfix/Courier/saslauthd/Amavis to look to the localhost replica for information.
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITSS/Shared Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html