Character mistake: When Jerry is being questioned on the lie detector test about "Melrose Place", the officer questioning him asks him two control questions that he responds to in full sentences. The questions should have been simple "yes" and "no" questions.
Other mistake: When George and Elaine are arguing about a bald woman rejecting him because he's bald, he says, "No one walks into a beauty parlour and says, 'Give me the Larry Fine.'" Larry Fine, who was partially bald like George, was a member of the Three Stooges. George should have said, "Give me the Curly Howard." He was another member of the troupe, and fully bald.
Suggested correction: This isn't a mistake; just because Curly was "more bald" than Larry, it doesn't make the joke wrong, or the statement an error. If anything, the fact that—as you point out—Larry's hair was more similar to George's makes it more appropriate that George references Larry rather than Curly.
