to_date gives odd results

example from docs:
pagila=# select to_date('05 Dec 2000', 'DD Mon YYYY');
to_date
------------
2000-12-05
(1 row)

slight modification:
pagila=# select to_date('05 December 2000', 'DD Month YYYY');
to_date
---------------
0001-12-05 BC
(1 row)

I can't imagine that's expected behavior.... bug?
oh,

pagila=# select version();
version
-------------------------------------------------------------
PostgreSQL 8.2.4 on i386-pc-solaris2.10, compiled by cc -Xa
(1 row)

--
Robert Treat
Build A Brighter LAMP :: Linux Apache {middleware} PostgreSQL