BUG #5714: TZ pattern error on to_timestamp

The following bug has been logged online:

Bug reference:      5714
Logged by:          Alexander Loechel
Email address:      Alexander.Loechel@unibw.de
PostgreSQL version: 8.4.5
Operating system:   Ubuntu Server 10.04. LTS
Description:        TZ pattern error on to_timestamp
Details:

After an update on my ubuntu system of postgres 8.4.4 to 8.4.5 the
to_timestamp methode produces different results.

in a CREAT View statement I have following methode call:
>>to_timestamp(dbtimestamp, 'YYYY/MM/DD HH24:MI:SS TZ') AS "timestamp"<<

Where dbtimestamp is a String coming from a CMS.

before migration it produces normal timestamps
after migration I get following Message:

"ERROR: TZ/tz format patterns are not supported in to_date"

I guess this behaviour is not intended as chapter 9.9 of the manual allows a
TZ pattern on to_timestamp().