Kornel wrote: > If I insert (as suggested there) in the preamble > \usepackage{xkeyval} > then everything compiles ok. > This should be done automatically IMHO.
This is a bug in polyglossia (which needs to load xkeyval): https://groups.google.com/group/comp.text.tex/browse_thread/thread/eedc39c0bc30ecc6/ The bug should be fixed in polyglossia itself (but if, as indicated on c.t.t, polyglossia is not maintained anymore, we might indeed add a workaround in LyX). Jürgen