"\d pg_class" fails in PG 8.4

Hi All,

Following is the error when i try to describe the catalog table.

Version Info
========
postgres=# select version();
version
-------------------------------------------------------------------------------------------------------------------
PostgreSQL 8.4.3 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
4.1.2 20070626 (Red Hat 4.1.2-14), 64-bit
(1 row)
Error
===
postgres=# \d pg_class
ERROR: column "reltriggers" does not exist at character 41
STATEMENT: SELECT relhasindex, relkind, relchecks, reltriggers,
relhasrules,
relhasoids , reltablespace
FROM pg_catalog.pg_class WHERE oid = '1259'
ERROR: column "reltriggers" does not exist at character 41
LINE 1: SELECT relhasindex, relkind, relchecks, reltriggers, relhasr...
Could you please guide me in this, and what is the cause for it..

Regards
Raghavendra