For some reason, on my SNES, certain planes of the PPU are totally corrupted.. It's not a cartridge thing, as I even went to resoldering the cartridge connector, and yet it's still having this issue. the power supply is fine, i even tried another one just in case.. I'm at a total loss right now... Check out this video (and still images), to see what I mean... the games run fine though...
http://blackevilweredragon.spymac.com/snes.mp4