Continuity mistake: When Prince Henry first approaches Leonardo da Vinci and then chases after the thief, the horse he rides on is dark bay in color and has no markings on its face. After he shouts, "Ugly peasant bastard!" in Henry's next close-up he rides a black horse with a white 'L' shape mark between its eyes. (00:20:20)
Continuity mistake: When Lady Ginette finds the cigar box containing the jewels in the freezer, there's two round gold things on it. The shot later, one of the object is smaller. Ice also appears on the box.
Revealing mistake: When there is a car crash, and a motorcyclist flies over one of the cars, as he rolls towards the windshield we see the whole windshield intact. Then when the motorcyclist rolls and hits the windshield, large cracks are clearly visible, way before the man hits the glass. (01:00:30)
Continuity mistake: After Chris is dead, and his wife is writing in her diary, and she writes "I still exist" as she's writing it, exist is written "EXST", then when she looks to read what she wrote it reads "EXT". The writing's different too. (00:22:10)
Visible crew/equipment: When Duke leaves the Mint Hotel and drives in the desert, the camera frames on a big cartel that reads "Welcome to Fabulous Las Vegas Nevada." Its shadow is projected on the road and with it also the shadow of the camera crane that shoots the scene. (01:01:24)