I should have added to my list the other day that the all notes off feature in Muse seems a bit flakey. QSampler hangs after every stop command and so does my Kontakt-VST machine. With Kontakt it doesn't stop even after using the panic button, but that could just be a Kontakt/Jack_FST thing.
With QSampler tho, it's on the same machine as Muse, but the notes still hang.QS does respond to the panic button however.
Maybe there needs to be a wait state in place before command transmission or something ?
Anyway thought I'd mention it.