odbc.ucas.com lookup problem

[Chris Thompson]

We're having some local reports about delays resolving odbc.ucas.com.
The problem is undoubtedly the response of "ns-lp.ucas.com", which
seems to be some sort of load balancer, to AAAA queries. I get log
entries from BIND like

Jul 20 14:35:12 koala.csi.cam.ac.uk named[4539]: [ID 873579 daemon.notice]
  DNS format error from 194.80.160.250#53 resolving odbc.ucas.com/AAAA
  for client 127.0.0.1#42869: invalid response

However, I haven't yet been able to work out exactly *what* is wrong
with the response, as demonstrated by dig (say). Any ideas?

-- 
Chris Thompson
Email: cet1 at cam.ac.uk