Problems with eastern European languages

I have a similar problem.
I use swedish as language but words inside my cms admin and on the webpage i create gets errors of some swedish characters. ()
It seems like its all runned through javascript wich it isnt.

Im searching a way to solve this because i cant use this editor if i dont solve this issue.

And we know for sure that its the FCK editor that causes this language problem, help is wanted!

True i have the same problem with windows-1251 encoding. Everything inputed converts to unreadable characters
If i press source button i see

äàñäàñä

http://www.bunny.huhttp://www.divecenter.hu