Continuity mistake: When Jet Li is playing football in the park and Maurice falls on top of him, Maurice's scar is on the left side of his lip, then when the camera cuts back to him it's on the right side.
Continuity mistake: When Jet-Li finds the paper with addresses in his brother's car, he wrinkles it when he puts it in his pocket. As he shows it to Aaliyah some time later it is a nice, unwrinkled piece of paper.
Continuity mistake: During the final fight when Jet gets thrown through the wooden framework, as he falls you see a black boxy shape on the right side of the screen. That's the camera recording his fall, and when he looks into the lens you get confirmation of the camera.