DNS server unable to interpret format

I get this error 5 to 8 times a minute, day in and day out. Machine is running Win2k server, sp3

DNS server unable to interpret format.
Registration of the DNS record ‘_ldap._tcp.Default-First-Site-Name._sites.dc._msdcs.RADINC.NET. 600 IN SRV 0 100 389 server.RADINC.NET.’ failed with the following error.
or
Registration of the DNS record ‘_kerberos._tcp.Default-First-Site-Name._sites.dc._msdcs……….
Other than a huge error log, everything else seems to be fine. Any suggestions?