When Monty expresses his disgust against Pakistan originated immigrants, the magazine cover placed on taxi cab's cabinet beside a Pakistani flag wasn't a Pakistani one, rather it was a Bangladeshi tabloid with Bengali font and their actors in it.
When Kostya is waiting outside Monty's apartment catcalling the women that walk by, he refers to himself as Russian: "I make you half-black half-Russian baby" We know from other scenes in the movie that Kostya is Ukrainian and does NOT like to be confused with Russians.
When Monty and Naturelle meet for the first time in the movie she's leaning forward to pet the dog, who's standing in front of her. In the next shot the dog is behind her back and Monty has to raise his hand holding a dog's leash over Naturelle's head to let her pass through.
In the scene with Nikolai, you hear Nikolai rack the slide, but the hammer is not back in the next shot. The camera then looks away (at Monty) and then back at Nikolai, and you can clearly see the slide is locked back and the gun is out of battery.
In the scene where Monty asks Francis to "mess him up before he goes to prison" Francis begins to punch him in the face with his right fist, and then alternately (in the far away scenes) he is using his left fist.
In the scene in which Naturelle tends to Monty's facial wounds, Naturelle is wearing a sweatshirt which reads "COVENTRY" (the prep school from which Monty was expelled). Near the end of the scene, Naturelle steps into the kitchen to fill a plastic bag with ice. As she enters the kitchen, her sweatshirt suddenly has two letters reversed. It reads "COVETNRY."
When Mary and Mr. Elinsky are sitting alone Mary's hair is continuously hanging down in her face. At one point she sweeps it behind her ears, but when the camera cuts back her hair is hanging just as before.
In the interrogation scene, the DEA agents inform Monty that he will sentenced under New York's draconian "Rockefeller Drug Laws." But given the arrest by a federal agency (DEA), prosecution by the U.S. Attorney, and sentence to a federal prison (Otisville), the case is clearly federal. New York law would not apply.
The scene in which Frank is awaiting for the Unemployment data shows a New York City afternoon time of 2:15pm. Unemployment rate information data is released on Friday morning at 8:30am New York City time.