If MIDI is configured to use Jack, start playback plays back two notes and then stops. Also, the note at the cursor is changed to the note of the first staff while playing back. I can produce this behaviour e.g. by creating a new score with two staffs, add a bunch of g's in the upper staff and a bunch of c's in the lower staff, go to the beginning and start playback with the playback control. This strange behaviour does not occur if I change MIDI input to Portmidi; in the latter case playback works as expected.
Andreas
