Hi,
I run Lilypond (x86) on Mac OS 10.7.1 (Lion).
I've noticed that in the last development versions
(including the last one: 2.15.14),
clicking on a note in a .pdf file generated by Lilypond doesn't
"hyperlink" and show the corresponding original code in the .ly file
anymore
(that happens only since Mac OS 10.7 & compatible Lilypond versions).
I can't give you a example in particular...
because all .ly generate such a .pdf file!
So you can simply try with the initial file:
\header{
title = "A scale in LilyPond"
}
\relative {
c d e f g a b c
}