When Jerry talks to Elaine about being the "master packer" a chair behind Elaine with a Yankees jacket draped on it moves around between shots.
In the opening scene the hallway of Jerry's (Jerry Seinfeld) apartment building is different than the hallway in The Kiss Hello (1995).
When Jerry, Elaine and George meet the new owners of the apartment at the party, Jerry's right sleeve is alternately (not) rolled up.
While Jerry and George are discussing the apartment in the restaurant (9:27) a customer at the cashier disappears and reappears.
It's clearly evident by ripples in the flooring of Jerry's new apartment that the wood is imitation sheet vinyl.
At the housewarming they are introduced to the waitress's new neighbour, as she walks away George (Jason Alexander) mumbles "Nice meeting you" and shakes the waitress's hand instead of the neighbour's.
The fireplace in the new apartment is gas but yet they discuss how to bring to wood into the apartment.
At the 16:45 mark, George shouts out "Why did I put out two?" as he heads into the bathroom after losing the Choose game for the new apartment. However, George put out one finger in the final round. It was Jerry who put out two.
Before leaving his apartment in Elaine's (Julia Louis-Dreyfus) care, Jerry (Jerry Seinfeld) tells her that no meat should ever be kept in his fridge. However in the pilot episode, Good News, Bad News (1989), Kramer (Michael Richards) comes by to take meat for his sandwich and finds some in Jerry's fridge.