Drag-selecting multi-voice note with deleted/missing rests in bar selects whole score

1. Create 4/4 piano score.
2. Enable 'Note Entry'.
3. Select Voice 2.
4. Enter crotchet.
5. Disable 'Note Entry'.
6. Delete the remaining rests in the bar.
7. Drag-select the crotchet.

Expected result: Only the crotchet should be selected.
Actual result: Everything from the crotchet to the end of the score is selected.

Using MuseScore 1.1 and 2.0 Nightly Build (4631) - Mac 10.6.8.