BUG #1217: wrong date->number of week conversion

The following bug has been logged online:

Bug reference: 1217
Logged by: Romuald Pilitowski

Email address: rpilitow(at)galera(dot)ii(dot)pw(dot)edu(dot)pl

PostgreSQL version: 7.4

Operating system: Linux Mandrake 10.0

Description: wrong date->number of week conversion

Details:

hi,
I encountered following problem - executing command:
select to_char(to_date('2003-12-29','YYYY-MM-DD'),'YYYY-IW-DD')
I receive
2003-01-29
(!!)

Frankly speaking I don`t know the adequate calendar ISO norm in detail, but
the last days of year shouldn`t be counted as F_I_R_S_T week of that year. I
expected PostgreSQL rather to return 2003-53-29.

Some extra details about my OS:

uname -a
Linux computer 2.6.3-4mdk #1 Tue Mar 2 07:26:13 CET 2004 i586 unknown
unknown GNU/Linux

SELECT version()
PostgreSQL 7.4 on i686-pc-linux-gnu, compiled by GCC gcc (GCC) 3.2.2
20030222 (Red Hat Linux 3.2.2-5

Romuald Pilitowski, Poland