Network Sol nslookup failing

[Roger Weiss]

I just tried to lookup one of my customers domains at ns and got the following:

Connection refused: invalid ip address
The previous information has been obtained either directly from the
registrant or a registrar of the domain name other than Network Solutions.
Network Solutions, therefore, does not guarantee its accuracy or
completeness.

Is this a problem on the OpenSRS side or did NS change one of their IP addresses?