Carl sent me his complete build (thanks!) for further investigation of
differences, and this unveiled an unpleasant surprise: We have
randomness in the construction of LilyPond EPS files.
I'm attaching an EPS output of both Carl's and my own build, together
with the corresponding source file; as can be seen, the EPS files
differ (I've checked that they display exactly the same).
Any idea how to fix this? The randomness itself isn't bad, but it
makes it much harder to find problems, and it might prevent
reproducible documentation builds. I suppose that somewhere in the
SCM code we need to sort a list or something like that while
generating output...
Werner