Continuity: As Sarah tells Harris of her weekend plans with her ex-husband, her hands change position on the car door between shots.
Audio/visual unsynchronized: After running into Sara and Roland in the museum, Harris picks himself up off the floor saying "I get that," but his lips are clearly saying something else.
Revealing mistakes: As Harris is driving south on the 110 freeway after the "Open Season on the L.A. Freeway scene", you see absolutely no traffic on the northbound side, even though it is mid-day.