Continuity mistake: In the scene where Jude and Tommy are celebrating Jude's birthday, in one shot Jude is leaning on the table with crossed arms facing Tommy, and the cake is to her left. In the very next shot, she is facing the cake, and Tommy is to her right.
Continuity mistake: When Tommy is confronting Jude in the alley, in the shot where he says "Shay's a kid," Jude turns her head to look at him, and in the very next shot, she's looking straight ahead, not at him.