Hello,
In previous versions of TeXLive the following code was working
\setmainfont[SmallCapsFont={Arno Pro}]{Minion Pro}\let\scshape\relax
\newfontfamily\scshape[Letters=SmallCaps]{Arno Pro}
This means that {\scshape text} would typeset the word text using thesmallcaps
of the Arno Pro font. Now
Please ignore my previous message. The solution follows:
\setmainfont{Minion Pro}[SmallCapsFont={Arno
Pro},SmallCapsFeatures={Letters=SmallCaps},
Mapping=tex-text,Ligatures=Common]
--Apostolos Syropoulos
Xanthi, Greece