IIRC slapcat doesn't work in this case, because it fails to initialize the ppolicy module. The linked CentOS and RHEL bugs recommend downgrading slapd to the previously working version and using ldapmodify.
Yeah, that's ugly :/ Another reason we really need to get slapmodify out, and some way to execute it with an option to not load modules or similar.
--Quanah -- Quanah Gibson-Mount Product Architect Symas Corporation Packaged, certified, and supported LDAP solutions powered by OpenLDAP: <http://www.symas.com>