Lilypond 2.16 and 2.18 incompatibility for \relative without absolute note outside the score

[Mark Veltzer]

Hello all,

Just moved to ubuntu 14.10 (utopic) and got lilypond 2.18.2 instead of
2.16.2 that was installed on ubuntu 14.04 (trusty). This broke all of my
tunes (I have about 150 of them since I do a big lilypond project).

The problem: \score { << \new Voice="foo" \relative { c d e f g } >> }

produces different outputs in the two versions. because I do not specify an
absolute note in the '\relative' syntax the first note inside the score is
supposed to be taken as absolute and therefore it is supposed to be middle c.
In lilypond 2.16 this is the case.
In lilypond 2.18 this is not the case. The first c in this example is drawn
as the c below middle c. I really don't know why.

I really don't care what the default of lilypond behavior as far as
\relative without a note outside the score is as long as it stays the same
across versions of lilypond. I now have to manually edit 150 files...:(

Trying to compile on 2.18.2 with \version "2.16.2" did not help me as I did
not get 2.16 behavior.

Hope this helps and I did not come off sounding harsh. I love lilypond
greatly, its just that I'm pissed at having to edit 150 files and I'm
wondering if I'll have to do this again in a half a year or a year...:)

Mark