Odd problem with pg_class ...

Morning all...
Am looking at a v6.4 system, and if I do:

select relname from pg_class;
It returns all the relations...but if I do:

select relname,relacl from pg_class;
It gives me:

pqReadData() -- backend closed the channel unexpectedly.       This probably means the backend terminated abnormally
beforeor
 
while processing the request. We have lost the connection to the backend,
so further processing is impossible.  Terminating.
Still investigating, but if anyone has any suggestions, I'm all
ears...

Marc G. Fournier                   ICQ#7615664               IRC Nick: Scrappy
Systems Administrator @ hub.org 
primary: scrappy@hub.org           secondary: scrappy@{freebsd|postgresql}.org