Broken subjects in RT correspondence

Hello,
We have a trouble with russian words in Ticket subjects - some e-mails
from RT arrives with broken symbols in subject.

Like this, [? and *] - broken symbols:

RE: [www.metabuilder.ru #10962] пїЅпїЅпїЅпїЅпїЅпїЅ ?пїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅ
[www.metabuilder.ru #10474] пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ ?пїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ
[www.metabuilder.ru #10948] пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ ?пїЅпїЅ RT3
[www.metabuilder.ru #10882] пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ * пїЅпїЅпїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ
[www.metabuilder.ru #10859] Auto_MB_Test: 10858 “пїЅпїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅ*пїЅпїЅпїЅпїЅпїЅ пїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅпїЅ пїЅпїЅпїЅпїЅпїЅпїЅ ?пїЅ пїЅпїЅпїЅпїЅпїЅпїЅ”

etc…

This bug was in RT 2.15, in 3.4.3 the same old…