Sprite selection outline box is misaligned

1. Open scene "1"
2. Click on the white square in the scene

Expected: The selection outline box outlines the sprite along its edges.
Observed: The selection outline box looks displaced, like it has shifted slightly left and down.

A few screenshots attached to contrast the difference from 5.6.0f3s2, 2017.1.0a6, 2017.1.0b1
The selection outline box was never perfectly aligned, but it was good enough to not be noticeable. In b1, it looks visibly off.

Occurring on 2017.1.0b1
Not occurring: 5.6.0f3s2, 2017.1.0a1-a6