First, or most obvious one I've found from currently watching the entire series chronologically is one season Elaine obviously had a history of being pleasured by Jerry's "Move", while just a while later, a season or two later, Elaine now says that Jerry never gave her an orgasm, that she "faked it all". I reckon we could explain it away that Elaine was just jerking Jerry's chain or something, but this seems a good topic... what other continuity contradictions has anyone out there found in Seinfeld?