Corrected entry: When the gang is thinking about baby names, Esther is brought up. We then see Marshall and Barney at the strip club where Esther shoots out a bunch of playing cards and one sticks to Barney's forehead. He peels it off and says "That WAS my card!" But he never looked at the face of the card, so he couldn't possibly have known which card it was.
Corrected entry: In Baby Talk, Marshall's father gives him advice on how to conceive boys and avoid conceiving girls, because Marshall's parents had "all boys." However, in the Season 1 episode Belly Full of Turkey, Marshall's sister is a part of the family.
Correction: The character you're referencing is Ashley Eriksen, which would be Marshall's brother Marvin's wife, Marshall's sister in law.
Blitzgiving - S6-E10
Corrected entry: When Ted is explaining the curse of the blitz, they are all shown at the bar. But the blitz guy says he is going to leave because he just got Madden 2k1. If it's 2001, why is Robin in the shot? They didn't know her then.
The Exploding Meatball Sub - S6-E20
Corrected entry: When Marshall is unable to join him for lunch and Barney trashes his office, paper rains down from above when he never actually threw paper up into the air.
Correction: Actually he does throw paper up. It happens very quickly, but it's there.
Correction: He said this as a joke. Esther wasn't doing a magic trick and Barney never picked a card in the first place.
Bishop73