Constant failed LDAP connections in log

While my server seems to be running fine in all other respects, I find that I have this message repeated about every 30 seconds in my log: Dec 7 09:46:45 faulkner DirectoryService[763]: InitLDAPConnection or ldap_init failure: Logging Failed LDAP connection with incomplete data Any hints on how I can make this stop? I can ssh in fine, and all other services seem to be perfectly ok.