[XeTeX] Kerning flaw with MinionPro & XeTex

[Alessandro Ceschini]

That would be redundant since the Polyglossia package already takes care
of selecting alphabet & language, thus also the relevant localized
glyphs if needed.

\usepackage{Polyglossia}
\setmainlanguage{Serbian}

However I tried to add:

\defaultfontfeatures{Language=Serbian, Script=Cyrillic,
Mapping=tex-text}

But it did not change the output.