Continuity mistake: In the scene where William H. Macy and Maria Bello are driving away from the casino after winning at the craps table they pull over and he loosens his tie a little before leaning out of the door to vomit. When he gets back in the car his tie is done up again and he loosens it a second time.
Revealing mistake: When Natalie is talking to Shelly in the office, the background set disappears in Natalie's close-ups. In the wide, you can see the wood-paneled door, and an illuminated wine rack behind her, but in her closeups the background is just black, like she was filmed on a sound stage. Even pushing the brightness on my screen to max doesn't bring up anything in the background.