Other mistake: JoJo finds inside the basket full of grapes the handkerchief he lost. Somehow, the name embroidered on the handkerchief quadrupled in size. (00:14:05)
Other mistake: The first victim of the mask in the series falls back against crates that must be made of dry leaves, since all it takes is for the body to lean against them to utterly shatter them. (00:18:55)
Other mistake: During the fight, Dio seems to have the upper hand a first time when he bends JoJo's spear. In a Batman-like manoeuvre, Jojo disappears when Dio is facing the other way to finish his speech, but the weird part is that all the corpses are suddenly gone too.