How to install UTF8 locale on PostgreSQL? I have a PostgreSQL 8.4 on Windows 7 machine, and my issue is that I have only the win1251 locale.

So when I create a database, I choose the UTF8 encoding and can select only lc_collate  = Russian_Russia.Win1251. And when I get any errors when I use JDBC I get unreadable logs.

How can I set a locale like en_US.UTF8 or ru_RU.UTF8?
PostgreSQL 8.4 supports only one locales that is selected in installation time. You need to rerun initdb statement with different locales (but only one can be used) or you can migrate to 9.x version, that supports more locales.