The GOUT has a few other weird visual issues, like one green laser that should be red in ROTJ, or the lights in Luke's garage in SW that are the wrong color, or the holograms' scanlines being...well, different, or the binocular HUD being red instead of green (or vice versa?) in ESB.
Check out the Complete Comparison thread if you're interested in these weird issues that no one can quite seem to make sense of.