Non Win/*nix UTF-8 codepage not known to PostgreSQL developers?!

Hello,

IBM-1208 is the name of the codepage on my operating system, just as several other...
CP850, CP437 (US) , CP1004 (same as win1252) etc.

Please note that this is also present within PostgreSQL 9.0.3

Add IBM-1208, IBM-850 etc. somewhere so that it doesn't complain?!
_____________________
[C:\PROGRAMS\PGSQL\BIN]initdb -D C:\U8DB --encoding=UTF8 --locale=sv_SE.UTF8
short_version = 8.4
The files belonging to this database system will be owned by user "postgres".
This user must also own the server process.

The database cluster will be initialized with locale sv_SE.UTF8.
could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
The default text search configuration will be set to "swedish".

creating directory C:/U8DB ... ok
creating subdirectories ... ok
selecting default max_connections ... 10
selecting default shared_buffers ... 400kB
creating configuration files ... ok
creating template1 database in C:/U8DB/base/1 ... ok
initializing pg_authid ... ok
initializing dependencies ... ok
creating system views ... ok
loading system objects' descriptions ... ok
creating conversions ... ok
creating dictionaries ... ok
setting privileges on built-in objects ... ok
creating information schema ... ok
vacuuming database template1 ... ok
copying template1 to template0 ... WARNING: could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
DETAIL: Please report this to <pgsql-bugs(at)postgresql(dot)org>.
WARNING: could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
DETAIL: Please report this to <pgsql-bugs(at)postgresql(dot)org>.
ok
copying template1 to postgres ... WARNING: could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
DETAIL: Please report this to <pgsql-bugs(at)postgresql(dot)org>.
WARNING: could not determine encoding for locale "sv_SE.UTF8": codeset is "IBM-1208"
DETAIL: Please report this to <pgsql-bugs(at)postgresql(dot)org>.
ok

...
Med vänliga hälsningar / With kind regards / Mit freundlichen Grüßen,
//Jan-Erik Lärka