Henrik Frisk <frisk.h@gmail.com> writes:

> So I changed to the main branch of
>
> git://git.savannah.gnu.org/emacs/org-mode.git
>
> and the new features you added to ob-lilypond is working (much
> appreciated) but I still don' have syntax highlight in source blocks
> though it works fine in lilypond-mode.

Is lilypond library is loaded when you open Org file?
What happens if you run C-c ' on an src-block?