Dear LyXers, documents that use the mhchem package (which is automatically loaded if required, by default) fail to compile with XeTeX or LuaTeX and TeX fonts.
The Math.lyx manual also shows missing or non-transformed output if used with XeTeX/LuaTeX and non-TeX fonts. Is there a way to make LyX aware of packages that are incompatible with XeTeX/LuaTeX? Günter