Other mistake: In the beginning of the movie where Baby Jim is talking about Treasure Planet, he crawls under the top sheet of his bed that has been folded half way up the bottom of the bed, and peeks out the bottom. That's fine and all but then his mother straightens out the sheet and covers him up. You then see that the part he just peeked out of was the folded part so he shouldn't have been able to peek out.
Continuity mistake: Captain Amelia is injured as the laser ball strikes the longboat that she, Jim and Dr. Doppler are escaping in. At first it appears her injury is quite serious and causing her a lot of discomfort. But when the pirates capture her and Dr. Doppler, and in the scenes where the pair of them are tied up, Amelia appears to be fine. But when the crew are escaping the exploding Treasure Planet, Amelia is clutching her ribs and is obviously unable to drive her ship, seeing as Dr. Doppler is doing so. And when Jim has saved everyone and the crew are congratulating him, Amelia is fine again.
Add timeBlue Phoenix
Continuity mistake: In the center of the planet, there is a scene in which Jim is helplessly hanging on a wall and Silver holds on the ship full of Flint's treasures. In the wide shot John Silver and Jim Hawkins are far away from each other, in the next close up the can almost touch each other, and in the next wide shot, they are far away again.
Add timeChristoph Galuschka
Plot hole: During the nova scene, everyone is tying down the sails after securing themselves with lifelines to the mast. Jim and Silver are on the front and Silver is knocked off. Jim is then all dramatic and runs to grab Silver's lifeline which seems to be coming from above, and pulls Silver up like a pulley. How come? The lifelines were attached to the mast, so Jim's action is pointless... even if he could do it, because a shot later both lifelines are streaming right to the mast, leaving no room for a pulley of any sort.
Continuity mistake: When Jim, Doppler and Amelia are in the longboat and it is hit by a laser ball, you see Amelia clutch her left arm where she is injured. Next, with both hands, Amelia steers the boat. When on land she starts to step forward but grabs her ribs (seemingly in pain) with her right hand and falls, bracing herself with her left hand. Her left arm was later in a sling. Where exactly WAS she hurt?
Continuity mistake: In the lens of the spyglass, Jim climbs out of the barrel, and two things happen after this: One, the spyglass moves from being close to the corner of the table (about 1 1/2 inches) to several inches away before Jim hits it with his hand.And two: As Silver confronts Jim in the galley, Jim backs away, and there's a shot of the table where the spyglass has completely disappeared, and a plate, cup and some type of pliers appear.