Continuity mistake: The tree creature pulls Mace's right hand and arm into the tree. Later, after giving Cindel the medicine, an Ewok examines the wound, which has switched to his left hand.
Continuity mistake: The ferret present during the scene where Wicket and Cindel talk about star cruisers disappears between shots. This is most noticeable when Mace walks in and begins talking to Cindel.
Continuity mistake: When Mace climbs into the cage, Catarine's head keeps changing position between immediate shots.
Continuity mistake: When Mace says "How are we going to get my parents down", he turns his head downwards towards the Ewoks. In the next shot his head is now facing upwards looking towards the cage and not at the Ewoks.
Continuity mistake: The blade on Wicket's knife goes from thick to thin throughout the entire scene he's being attacked by the spider.