http://bugs.winehq.org/show_bug.cgi?id=10025
--- Comment #5 from Dmitry Timoshkov dmitry@codeweavers.com 2007-10-14 00:14:38 --- Most likely this "regression" is caused by introduction of Tahoma font replacement which currently doesn't contain cyrillic glyphs at all.
To the original reporter: UTF-8 is not a locale, ru_RU.UTF-8 is. Whta's your real locale name?