Continuity mistake: When Scooby and Shaggy are at the "Hotus Dogus" stand in the Coliseum, you can see that Scooby has two flags in his left hand, but after a quick close-up of Scooby, we return to him and his flags have disappeared.
Continuity mistake: Fraw Bow cries on her mother's corpse that is on the ground face down. Amuro walks to her to console her (and to bitch slap her) and the woman is lying face up all of a sudden. (00:15:25)