gdm-2.28.1_1 language menu empty

[Giorgos Keramidas]

I've just finished updating my gnome2 2.26 install to 2.28 with
``portmaster -a'' and it worked flawlessly except for one minor bug: the
language menu of gdm doesn't show any language at all.  This means that
if I don't force LANG=el_GR.UTF-8 and LC_ALL=el_GR.UTF-8 in my .profile
gnome2 can only start with LANG and LC_ALL set to 'C'.

Where does gdm look for a list of available languages?  Also, has anyone
else seen this too?