OS X 10.6.2 - r.2674
Voice exchange (edit > voices > exchange voices x-y) fails when incomplete measure is selected
Different behaviour according to number selected measures:
1. Less than one measure is selected:
notes in complete measure and *all* following are changed when exchanging voices
2. Multiple measure selection ending with incomplete measure:
notes in last, partially selected measure are unchanged when exchanging voices
3. Multiple measure selection starting with incomplete measure:
all notes in first, partially selected measure are changed when exchanging voices