Updates:
Owner: [email protected]
Comment #3 on issue 2835 by [email protected]: set Instrument Change information
once per Staff, not once per Voice
http://code.google.com/p/lilypond/issues/detail?id=2835
As far as I can see, the Mozart horn stuff does not use instruments, so whatever the reason for the problem may be, it would not be related to this change. We probably need to watch out for similar occurences.
The changed regtest in the screenshot, however, would seem serious.
