is this is a known bug?

ERROR:
@(#) $OpenLDAP: slapd 2.4.11 (Mar 26 2009 08:14:38) $
daemon: IPv6 socket() failed errno=97 (Address family not supported by protocol)
slapd starting

nssov: group entry cn=Domain Admins,ou=Groups,dc=domain,dc=com contains invalid group name: "Domain Admins"
--
grexk