Version 1.0, Windows Vista
1. enter three quarters on top space in voice 1 (leaving beat 4 a quarter rest)
2. enter four quarter notes on middle line in voice 2
Result: last quarter note of voice 2 overlaps rest in voice 1. Ideally, there would be an option in the Voices style settings to control positioning of rests. I expect to have to move rests manually on occasion, but a default to adjust rests by 6 spaces would be typical.