Factual error: In the scene at the beginning of the movie as the 3 youths walk up the street, you can see current MA license plates, although the action should have taken place many years earlier.
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Mistakes
When Penn is drinking whiskey, he puts the bottle on the table, with no hull, later it has a hull and then it's again with no hull. See more...
Mystic River (2003)
Directed by Clint Eastwood, starring Kevin Bacon, Laurence Fishburne, Marcia Gay Harden, Sean Penn, Tim Robbins (add more)
Mystic River mistakes
Visible crew/equipment: Before we first see the marching band, and Kevin Bacon finds out what his daughter's name is, there is shot looking at him in his car and he drives off screen. As the car goes out of the shot to the left, check out the reflection of the camera man in the rear driver's side window.
Continuity: When Sean Penn is being interrogated by the cops, his coffee mug is yellow in the wall angle, and white in the rest of the shots.