Probably forum error

It seems there is some incompatibility between the forum engine and my environment. I'm trying to post a message and they appear in the wrong encoding. Sample is here:

http://pctuner.ru/forums-m-posts-q-2446.html

OS: Linux (Fedore Core 3)
Broswer: Firefox 1.0.4
Default Browser Encoding: KOI8-U (However browser indicates that)

What could be wrong here (with previous forum design it worked OK)?

Thank you in advance.

--
Best regards,
Andrey.

А браузер нельзя переключить на windows-1251 ? Тут к сожалению я ничего не могу поделать, нужно разбиратся в браузером...