Continuity: In the final showdown between Ivanhoe and Brian de Bois-Guilbert, Ivanhoe cuts Brian de Bois-Guilbert's shield in half. In the next scene we see Brian de Bois-Guilbert turn his horse for a new charge, and his shield is undamaged. But when he reaches Ivanhoe, the shield is broken again.
Continuity: Ivanhoe's shield is punctured by Bois-Guilbert's lance in the joust. In subsequent scenes the hole disappears, then reappears.
Continuity: In the second joust at Ashby, they joust with blunted lances. During the charge, the templar's lance clearly lacks the metal end-cap. In the next shot, when he makes contact, the cap is in place.