invalid value for parameter "lc_messages": "en_US.ISO8859-1"

Hi,

Details below:

Initdb fails on: creating template1 database in
/ema640/pgsql/data/base/1 ... FATAL: invalid value for parameter
"lc_messages": "en_US.ISO8859-1"

PG 8.2.4, AIX 5.3

German customer (I assume that it has some implications of locale).

Can anyone help me in recreating the problem? Everything runs
Fine for me ona US machine, for both LC_MESSAGES="C" as
Well as LC_MESSAGES="en_US.ISO8859-1"

Thanks a lot

Danny Abraham