Other mistake: In the beginning of the film, when they are showing Dre's "growth chart", it shows about 2.5 inches of growth between April 2003 and May 2003, which is not possible. And no, there is nothing in the movie that indicates he has some sort of abnormal condition that causes rapid growth.
Other mistake: In the middle of the movie, there is a scene with the two moms on the couch talking. One mom (red hair lady) wears a necklace with a charm that says "love." There are two camera shots in this scene, one looking directly at her, and another from over her left shoulder. Depending on the shot, the 'love' charm is either visible or tucked under the top of her shirt. This swaps back and forth.
Other mistake: The impression of Robin Hood's hands in cement, made as a child, match the size of his adult hands.
Suggested correction: There were two sets of handprints. The one on the left was that of a child. The one on the right was that of an adult. When Robin reopens the slab, the prints are covered in mud and debris. He runs his hand over the child print then puts his hand in the adult print of his dead father.
Other mistake: When robbing the bank at the beginning of the movie, Claire is somehow about to see the tattoo on the back of Gem's neck while he is standing, and she's lying on the floor looking up.