Continuity mistake: When Dan is in Larry's office, the bed behind Dan has tissue paper protecting it. After Larry gets up from behind his desk he goes up to Dan. Larry then goes to the bed and pulls a paper sheet over the uncovered bed to ready it for his next patient. Larry was never near the bed in any of the shots before this and even the one rare shot he was not on camera he wouldn't have had time to remove the sheet and get it out of the way.
Continuity mistake: When Clive Owen throws most of the money at Natalie Portman a bit after he keeps trying to find out her real name, she is putting the money into her handbag. As she is putting the money in her handbag she is holding it up near her chest. The following shot she is still putting the money in her handbag but it is now close to or resting on her legs.