http://bugs.winehq.org/show_bug.cgi?id=10025
--- Comment #23 from Slava Gorbunov slava@fizlesh.org.ru 2008-02-04 11:05:39 --- (In reply to comment #5)
Most likely this "regression" is caused by introduction of Tahoma font replacement which currently doesn't contain cyrillic glyphs at all.
Why not to fall back on some default font that contains all necessary glyphs for characters not present in Tahoma replacement, like most other applications do? I suppose it would be better than replacing them with ':'.