Factual error: 2-7 "The Crimsom Avenger": At Dunwyn Erwyllan grabs a bundle of money bills from a fishmonger. It may be just a curiosity since paper money wasn't used in real medevial times, but it is still odd as gold coins are still in heavy use in all other episodes. Even the royal treasury, which is robbed in this very episode, has only bags of coins and no bundles of paper money.
Plot hole: 5-10 "Princess Trouble": The catapult King Jean-Claude accidentally triggers smashes the siege tower on which Calla and Marie are fighting over Sunni. But since Jean-Claude's catapults are all aimed at the walls of Dunwynn, how come it smashes the siege engines on its own side? Neither catapult nor tower were moved before the misfire occurs.
Continuity mistake: 0-0 Across wole show: Those ogres assigned to do certain tasks throughout the series sometimes change their overall looks - color, hair, and helmets - in several episodes, from one scene to the other.