If you have a Mac OS X 10.3 Open Directory Master and one or more Mac OS X 10.3 LDAP Replicas, and want to update to Mac OS X 10.3.9 Server, please update the servers in this order:
If the servers are not updated in this order, the LDAP Replicas may get out of sync with the Open Directory Master. If this happens, reset the role of the servers from LDAP Replicas to Standalone servers using Server Admin, then convert them back to LDAP Replicas after you update the Open Directory Master to Mac OS X 10.3.9 Server.