Continuity mistake: Conan and Bombata lift the stone door and the idiot thief goes in to find the lock. The thief swings the lock lever from right to left. When the party enters, the lever is back to the right. (01:06:01 - 01:06:42)
Continuity mistake: When Zula approaches Conan's company and asks to join them, she clashes with Bombatta and he breaks her spear into pieces with his mace. Later in Toth Amon's tower her spear is suddenly good as new.
Suggested correction: It's a different spear. Spears are cheap and easy to make.
Continuity mistake: During the ambush scene, when one of the baddies activates a trap and gets stabbed in his stomach, the position of his hand is inconsistent between shots.