I am not sure this is a bug but I request help

Firstly the screen shot shortly:
[bpotur@bpntbk bpotur]$ postgres -s
FATAL:  XX000: failed to initialize DateStyle to "ISO, MDY"
LOCATION:  InitializeGUCOptions, guc.c:1866
OR:
[bpotur@bpntbk bpotur]$ postgres
FATAL:  XX000: failed to initialize DateStyle to "ISO, MDY"
LOCATION:  InitializeGUCOptions, guc.c:1866
[bpotur@bpntbk bpotur]$

 The platform is [gelecek kurumsal linux] (a fedora v2 clone in Turkish)
iso source: ftp://ftp.iqchoice.com/pub/geleceklinux/gkl-3.0/
GKL-cd1.iso and
GKL-cd2.iso two cds totally installed (full install)
Firstly the pgsql coming with the distribution gives the same bug
error.  Then all the pgsql programmes coming with the original gelecek
installation are uninstalled.
Then all the files at the site
http://download.fedora.redhat.com/pub/fedora/linux/core/2/i386/os/Fedora/RPMS/
 that is:
 postgresql-7.4.2-1.i386.rpm      06-May-2004 18:49   1.9M
 postgresql-contrib-7.4.2-1.i3..> 06-May-2004 18:49   433k
 postgresql-devel-7.4.2-1.i386..> 06-May-2004 18:49   1.9M
 postgresql-docs-7.4.2-1.i386.rpm 06-May-2004 18:49   1.2M
 postgresql-jdbc-7.4.2-1.i386.rpm 06-May-2004 18:49   695k
 postgresql-libs-7.4.2-1.i386.rpm 06-May-2004 18:49   140k
 postgresql-odbc-7.3-6.1.i386.rpm 06-May-2004 17:53   126k
 postgresql-pl-7.4.2-1.i386.rpm   06-May-2004 18:49   421k
 postgresql-python-7.4.2-1.i38..> 06-May-2004 18:49    38k
 postgresql-server-7.4.2-1.i38..> 06-May-2004 18:49   3.0M
 postgresql-tcl-7.4.2-1.i386.rpm  06-May-2004 18:49    22k
 postgresql-test-7.4.2-1.i386.rpm 06-May-2004 18:49   1.0M
 php-odbc-4.3.4-11.i386.rpm       06-May-2004 18:51    35k
 php-pgsql-4.3.4-11.i386.rpm      06-May-2004 18:51    43k
all are downloaded and installed easily with rpm -i command with no
errors.
Then again:
[bpotur@bpntbk bpotur]$ postgres
FATAL:  XX000: failed to initialize DateStyle to "ISO, MDY"
LOCATION:  InitializeGUCOptions, guc.c:1866
[bpotur@bpntbk bpotur]$
Who am I? I am trying to translate and adapt care2x into Turkish.
http://www.cate2x.com/foundry/
And I have been told by a friend that I should start with pgsql just
from the beginning. Though the program seems to be working excelently
and efficiently with mysql as you will see at the above demo address.
I hope somebody in this list could help me.
Regards.
Bulent Potur MD Obgyn
http://medpages.obgyn.net/bpotur/