UPPER()/LOWER() and UTF-8

Hello,

I'm running Postgresql 7.3.4 with ru_RU.UTF-8 locale (with UNICODE
database encoding), and all is almost well, except that UPPER() and
LOWER() seem to ignore locale.

I searched the sources couple of times, but do not understand where is
the implementation of UPPER()/LOWER(). Could you please point me to
the right direction?

I'll try to understand and fix that. (But maybe patches for that
exist? Or maybe FreeBSD 4.8-RELEASE utf-8 locales are broken in that
respect?)

Thanks a lot,

--alexm