I've opened a bug report (3542166) on sourceforge for the dropped notes problem:

http://sourceforge.net/tracker/?func=detail&aid=3542166&group_id=4932&atid=104932

  Shouldn't be too hard to figure out.

  I've also successfully reproduced a crash.  Looks like a wild pointer.  While recording, Composition::m_tracks was suddenly 0x8.  That could take a while to track down.

Ted.