pg_dump cache lookup error

Hi,

I'm running 6.5.2 (I plan on upgrading as soon as I get this fixed)
and I get the following error when I try to dump the db:

[kmay@infosport hockey]$ pg_dump gamesheet > gamesheet1.out
dumpRules(): SELECT failed for table attendance.  Explanation from
backend: 'ERR
OR:  cache lookup of attribute 4 in relation 343169 failed
'.

Thanks in advance,

Killian May
InfoSport Inc
killian.may@infosport.com
(902)423-0662 fax(902)423-0390