Continuity mistake: When escaping in the minefield, Dom's car gets bullet holes in the bonnet. When we see the car after Roman has escaped his truck landing on the landmine, the bullet holes have disappeared. (00:16:20 - 00:20:50)
Continuity mistake: When Patrizia paints her phone number on the scooter's windshield the numbers change between shots, check the 5 for example.
Continuity mistake: When Booth first arrives in Bali on the boat he's wearing a brightly patterned tropical shirt, and between shots the shirt's pattern completely changes, though it's the same style of shirt, then it changes back again. (00:13:40)
Deliberate mistake: When the gangs meet in the toilets to set a date for the brawl, the mirror on the left is the only one opaque, most surely to avoid reflections of the filming crew.
Revealing mistake: When you see Hutch walking backwards through a doorway firing his gun, you can see an actor in the background in the entrance looking directly at the camera. As Hutch passes past him, he puts his head against a wall and plays dead again. (01:18:32)