Continuity mistake: In some shots there is no steam coming from the steamboat.
Continuity mistake: When Captain Kiddie is telling stories to Robyn, he is standing in front of a curtain. Between shots the curtain constantly changes from red to purple.
Continuity mistake: Captain Kiddie is in a small inflatable raft, chasing the steamboat. We see in a closeup that he is merely feet from the steamboat. However in a wide view the raft has completely disappeared.
Continuity mistake: When Robyn is coloring and singing, she sets the first picture to her left side. In the next shot the picture completely disappears, then reappears.
Continuity mistake: When Robyn, Tom, and Jerry are underneath the bridge, Robyn's backpack disappears in one shot.
Continuity mistake: Robyn opens the window to let in Tom and Jerry, and she opens both sides of it. However, when she goes to close the window, only one pane is open.
Continuity mistake: After Ferdinand knocks most of the planks off of the bridge, in one following shot, you can see that the whole bridge is intact, with all planks back.
Continuity mistake: Near the end, Captain Kiddie is holding Robyn hostage in a ferris wheel. However in one shot of him, we see another ferris wheel behind him. In overhead views, there is only one.
Continuity mistake: When Robyn, Tom, and Jerry are escaping, she is wearing a raincoat. However, in one shot during that scene, the raincoat completely disappears.
Continuity mistake: Several times throughout the movie, the two lone hairs on top of the doctor's head disappear and reappear.
Continuity mistake: When Aunt Figg brings Tom and Jerry to the evil doctor, they are in a small cage. The amount of bars on the cage keeps changing.
Continuity mistake: When Tom and Jerry are running around the house, Jerry breaks a dish, and we see it smash at his feet. In the next shot the shards vanish.
Continuity mistake: When Tom and Jerry are on the small raft, Tom is lying on a backpack. Between shots a strap appears on the backpack.
Audio problem: When Tom and Jerry are in the cage, Pugsy says, "How'd you guys wind up in a dig like this?" However his mouth is way out of sync with the audio.
Continuity mistake: The bedspread in Robyn's room constantly changes. Sometimes it is green, sometimes it is blue, sometimes it is squared, and sometimes it is seamless.
Continuity mistake: Aunt Figg crumples the letter from Robyn's father and throws it in the fireplace. Yet, when she finds that Tom and Jerry have stolen it, there are no lines or creases in the letter and the section that got burnt has disappeared.
Continuity mistake: When Tom climbs over the fence in a close-up, the part of the fence he's climbing over is spiky. In the next shot the entire top of the fence is flat.
Audio problem: When Dr. Applecheek thinks he has captured Robyn, he says, "I've got her." When he says this, his mouth doesn't move at all.
Continuity mistake: When Robyn is being pulled up on the rope by Tom and Jerry, there is excess rope hanging down, under her. In the next shot, there isn't.
Continuity mistake: Several times throughout the movie, Robyn's front doors change. Sometimes the doors have glass panes, sometimes they are solid wood.
