Problem with cyrilic

Hello!
I have a trouble with PostgreSQL 7.1.3 (and 7.1.2 too). My OS is Solaris 8x86 with russian locale. PostgreSQL was builded from sources and configured with : --enable-locale --enable-multibyte=WIN.
My problem with sorting lowercase russian words in the text fields (type - "varchar") after cyrilic letter "P".
create table test (id serial, rubrik varchar (255));
Then inserting words in russian (from the client written on php - encoding win1251)
select * from library order by rubriks - will cause this problem.
I think that this problem is only on Solaris systems because my friend use it on Linux SuSe and he don't have any troubles.

regards
kosha