Kate and Dexter would not have been able to place ladders against the poster of Ron Anderson; the next scene shows an awning that would have been in the way.
The license plate on the ambulance bringing Kate to the Elephant premiere changes between shots.
(at around 1h 6 mins) In a hallway made of bricks, a drunk character falls against the walls and onto the floor, causing the "brick" set to wobble.
Cheryl trails her fingers across the piano keys; the sound is not heard until after the cutaway.
In a shower scene late in the movie the camera moves to a high vantage point, showing the shorts that Dexter is wearing.