Just a minor improvement:

On Fri, 15 Nov 2013, Lars Huttar wrote:

> % Temporarily change the main font, while keeping the main font fallback:
> { \setmainfont[\titlefont] \switchtobodyfont[40pt] Title with a fancy
> ɠlyph }

Make that {\setmainfont[...] ... \endgraf}

Otherwise, the interline space will not be calculated correctly.

Aditya