] This problem seems to be upstream, as DK sussed out, but if you're not
] supposed to be now authoritative for these subdomains, might it not be
] best to stop serving them, ie pull your zonefiles? 

No.  Seol *is* supposed to be authoritative for these subdomains,
so they should *not* stop serving them.

What they should do is stop asking whois about DNS servers (at least
for sa.gov.au).

If you want to know whether you are not supposed to be serving a zone
any more, ask DNS servers (preferably the DNS servers for the parent
of the zone in question - in this case the sa.gov.au DNS servers),
not whois servers.

] While the DNS should
] adjust and ignore undelegated or misdelegated servers, I've seen ongoing
] confusion and periodic SOA pingpong disagreements lasting months.

It will always cause problems for people who happen to use that DNS
server as an upstream for DNS queries (eg: seol ISP customers would
see the old version of the DNS info for robe.sa.gov.au).

___________________________________________________________________________
 David Keegel <djk&#167;cybersource.com.au>  http://www.cyber.com.au/users/djk/
 Cybersource P/L: Linux/Unix Systems Administration Consulting/Contracting