Continuity mistake: In the scene where Avner shoots the first Palestinian, the dead man falls forward onto his groceries, but the next time the body is seen, he is lying on his back.
Continuity mistake: When Balian is talking with Tiberius after denying the King's proposal, watch Balian's clothing. His chain mail is visible on both sides of his shoulders in one shot; we cut to Tiberius for one line (I believe it was, "Jerusalem has no need for a perfect knight") and when we cut back to Balian, his cloak is now covering the chain mail completely.
Continuity mistake: When Francis and Eddie are on the spectators' shoulders, Eddie is behind Francis and removes his hat. The next shot Eddie is next to Francis and has his hat on. (01:50:35)