Factual error: When Rachel and Samuel are at the 30th Street Station in Philadelphia, the door Samuel walks through is not (and never was) the men's room entrance. The men's restroom is further to the left, behind the wall and out of the camera view. Also, the men's room at the 30th Station was never that dingy looking and, at that time of day, would have had a very steady flow of patrons going in and out.
Continuity mistake: When the local bums provoke the Amish, Viggo Mortensen's hat is grabbed twice - for the first time when the leader of the gang smears Alexander Godunov's face with ice cream, the curly-haired guy can be seen swiftly grabbing Mortensen's hat in the background. Thereafter Mortensen is hatless - until the same curly-headed bum grabs his hat again, now in the wide shot. (01:25:05)Orsi