[XeTeX] fontspec: Unknown feature `' in font `TeX Gyre Heros'.

[Martin Schröder]

Hi,
when I set up TeX Gyre Heros on Windows thusly:
-----------------
\setmainfont[Ligatures=TeX]{TeX Gyre Heros}
\setsansfont[Ligatures=TeX]{TeX Gyre Heros}
-----------------

I get the warning
-----------------
Requested font "TeX Gyre Heros/ICU:script=latn;language=DFLT;mapping=tex-text;;
" at 10.0pt
 -> C:/Program Files (x86)/MiKTeX 2.9/fonts/opentype/public/tex-gyre/texgyreher
os-regular.otf
Unknown feature `' in font `TeX Gyre Heros'.
-----------------

Why? The ligs seem to work. :-)

System is MikTeX 2.9 (XeTeX is 0.9997.4 (MiKTeX 2.9), fontspec is
2010/11/17 v2.1e).

Best
   Martin