Continuity mistake: After the Stormtrooper tells Darth Vader the Death Star plans are not in the main computer, when Vader lifts the Rebel off his feet by his throat as the Rebel tells him they intercepted no transmissions, take note of the leg plates on the Stormtrooper to Vader's right. In the wide shot, the Stormtrooper's left leg armor does not have the knee protector plate (it looks as if it's at his right knee because the extra switched them), but in the next closeup the knee plate appears at his left knee, as it should be. The trooper also appears to go from right handed to left handed weapon carry. (00:05:40)
Continuity mistake: When Christopher Robin picks up Eeyore's tail, he and Kanga are several feet away. But in the next shot they're right next to the donkey. (00:07:35)
Continuity mistake: The headlight that is attached to the left side of the windshield frame on Medusa's motorboat, jumps to being on the right side of the frame for a shot, after the female mouse says she'd like to hit Medusa with her rolling pin. (00:37:20)