Continuity mistake: When the guys arrive outside Donna's building, Josh wears a tux and a long black coat with a white scarf. After Josh says, "The buzzer's not working", a few quick camera cuts occur, and as he says "Nah, I know women-" and turns, the scarf is missing. It is back as the cameras cut again and he says, "I know what they like."
Continuity mistake: Bartlett is in the executive office in the residence watching four TVs at once. He hears a line in the black and white movie, a second later he rewinds it to hear the line again - he rewinds way too much and for too long, but once he stops the tape, it plays the line he wanted to hear again right away. He went too far back (for visual effect) than what in reality it would have taken.