Why my Firefox doesn't display Cyrillic fonts well?

[Yuri]

Boris Samorodov wrote:
> Install x11-fonts/webfonts and do apropriate changes to xorg.conf.
> I have webfonts right after misc fonts at xorg.conf. That always
> gave me good results.
>   

I placed 'webfonts' into xorg.conf after 'misc' but firefox still shows 
Cyrillic texts in a messed up way. Also in Belarussian texts letters і 
and ў stand out (ex. http://be-x-old.wikipedia.org).
And Opera shows Cyrillic texts very neatly. I don't quite understand 
what causes such difference.

Ubuntu Linux doesn't have such problem at all, not in firefox and not in 
opera.

Yuri