After watching all the episodes in order recently I wondered if there were any errors fans have caught debating early episodes where the later ones countered certain statements the characters made.
There is a lie that is never revealed in the entire series run regarding Jerry and George seeing the movie 'Prognoses Negative' (The Dog 3.4)(usually the lies all manifest themselves somewhere along the way)and this would have made Elaine extremely mad that they she wouldn't have seen it as well but, they both go anyway because 'Ponce De Leon' is sold out. In The Movie (4.14) George and Elaine are waiting to see 'Checkmate' and discuss the movie 'Ponce De Leone' which they were supposed to see together in The Dog but it was sold out so they ended up talking at Monk's instead. Elaine never saw the movie that I can recall and neither did George. Although, Elaine does see movies occasionally with other people (The English Patient 8.17) there's nothing showing that either of them saw it with anyone else. Too nitpicky, huh?;)
What are some others though?