Just noticed this and its been there for a while (Altirra 1.7 does it too). I tried to play Ghost Hunter and on Altirra on the right side of the screen, the boarders of the walls and dots are misaligned (see photo). I'm pretty sure Ghost Hunter works well on real hardware.
P.S. Ghost Hunter requires OSb. Anyone have a copy that works on an XL OS? This is the only dual player (simultaneous) Pacman out there and it would be great if it worked on an XL OS.