Corrected entry: Next to Lena's apartment there is a fire protection door in the hallway with a closing mechanism. However, when he leaves her after the rendezvous the door is open (and stays open while he walks off and Lena closes the door to her apartment). But when he returns a minute later to make up for the rather formal good-bye he dramatically storms through the fire protection door which is now closed, although there's nobody around who might have done that.
Corrected entry: Barry asks the phone sex lady to call him jack, but she calls him Barry near the end of their first conversation...
Corrected entry: When Barry calls the "matress company" about getting his money back (on the computer phone) if you look closely you can see the reflection of the camera in the top right area of the glass.
Corrected entry: When Barry rips apart the bathroom, the owner tells him that his hand is bleeding. When they walk out, he lifts his hand up and there is no blood or cut on it then and throughout the whole movie.