I recently started using midi notes below c0 for patch changes in Kontakt. Every now and then when I open the Key Editor, all notes on c-2 move up an octave to c-1.
This happens randomly and without selecting the notes themselves and only on c-2, c#-2 and up are unaffected. I’ve never actually seen the notes move, and it only happens maybe about a quarter of the time (if I had to guess).
I’ve unplugged my external midi devices to rule those out.
Mac OSX 10.8.3