Russian language uses other character set. There was ASCII-8 encoding and newer UTF-8 encoding. They are different.
We found some bugs at the forum using Safari 4.

Post of Yurik is corrupted. Seems to be interpreted as ASCII-8 (Cyrillic Windows) while really UTF-8.
In my reply we see good characters because ReplyEditor understand unicode.

I never see such bugs at russian forums but on insanely - yes.