Continuity mistake: Richard Dreyfus comes home drunk after his horrible opening night. He stumbles around the living room knocking over furniture, including a table by the window with a typewriter on top. Next time you see the table, it is all together again.
Continuity mistake: When Marsha is in the bathtub, she tells her daughter to bring her a Coke. She opens it, takes a drink and sets it on the edge of the tub, but when Richard walks in and they start talking, the Coke can is missing.