When Kramer is telling the story about baseball camp, his suitcase in the hallway goes from closed to opened and back to closed.
Between 1:19 - 1:21, the camera pans instead of switching cameras.
Jerry says that it's Babu's visa renewal form but hasn't opened the envelope to know what it is.
When Jerry answers his apartment intercom to George he starts speaking before he has pressed the button.
The poem that Jerry quotes is not a sign on the Statute of Liberty but a poem, "The New Colossus," by Emma Lazarus.