Continuity mistake: When Richard Gere is driving through the city in his Corvette convertible, he starts with the top down, then you see the car with the hard top bolted on, then again without.
Continuity mistake: When Dennis is talking to Raymond's wife at the restaurant, as he's watching from across the street, her hands under her chin change from one to both as the view changes from across the street to inside the restaurant.
Continuity mistake: As Kathleen gets home towards the end, she unbuttons her blouse as she walks into the bathroom to turn on the shower. She then turns around after turning on the water and her blouse is buttoned back up.