Continuity mistake: During the scene when Mickey walks into the urinals trying to steal the videotape, he has the phone in his hand calling the switchboard. He then puts it into his hand and turns the taps on. He washes his hands and leaves the urinals without the phone in his hand. Then, in the next shot, he walks through the door with the phone in his hand and puts it into his pocket. (00:11:00)
Continuity mistake: As Victor and Mickey are talking in Victor's office, Victor has his feet placed on his desk. He then removes them and leans forward to speak to Mickey. In the next shot, his feet are suddenly on the desk again. (00:11:50)
Deliberate mistake: When Sam first meets Mickey (who is posing as a bank robber), Mickey says he needs Sam to state that he needs Mickey's help in robbing a bank, so if Sam turns out to be an undercover cop, Mickey can plead entrapment. This is a classic error. Entrapment only exists where a cop actively persuades a criminal to do something he otherwise wouldn't have done - which is not the case here. If Mickey as a con artist knows this (which is likely), it's a deliberate mistake, otherwise it's a factual error. (00:30:09)