Original sprite
If I process it with 64 colors and "Remove background" and "Auto Detect" enabled, then the "compare" mode shows the result as having a white background and some partial pixels (towards the bottom left):
If I go to the "result" pane, the white background and the partial pixels disappear:
My guess is that the original sprite is being drawn underneath the left pane of the "compare" window.
Original sprite
If I process it with 64 colors and "Remove background" and "Auto Detect" enabled, then the "compare" mode shows the result as having a white background and some partial pixels (towards the bottom left):
If I go to the "result" pane, the white background and the partial pixels disappear:
My guess is that the original sprite is being drawn underneath the left pane of the "compare" window.