I did have noticable ghosting on both Comet and Pinball Life LEDs in my Sinbad shortly after receiving it. Like stated above- there shouldn't be any, so that was a definite clue that something was wrong. Turned out to be a flakey edge connector (connector problems on a System 1? No way!). Connector replaced. Ghosting gone. I have all Comet frosted in everything except GI now, and it looks fantastic.