[Plugin: WordPress SEO by Yoast] Polish fonts in description metatag

Polish fonts are not visible in html code and also in serps. (in description metatag)

Instead of “koreański utwór bije już rekordy popularności”

I see

“korea?ski utwór bije ju? rekordy popularno?ci”

http://wordpress.org/extend/plugins/wordpress-seo/

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