After installing version 2.3.20 and running slapcat to populate database with data from version 2.0.27 I get this on a test search:
Have you updated your ACL's to the 2.3 syntax? Have you examined the log files?
--Quanah
-- Quanah Gibson-Mount Principal Software Developer ITS/Shared Application Services Stanford University GnuPG Public Key: http://www.stanford.edu/~quanah/pgp.html