Pirates of the Caribbean: Dead Man's Chest

Here are some interesting movie mistakes:

• There are six metal bars mounted around the circumference of the water wheel's axle. In the wheel's interior, when Jack frees himself he lands on his feet, begins to run and promptly hits his head on one of those axle bars, then falls out. Moments later, when Jack returns and runs in the wheel, he is considerably shorter (way more than a foot) than all six spinning axle bars, which would make that previous shot impossible, however humorous it is.
• When paprika-seasoned Jack is tied and bound, hanging over the wood pile, the soles and heels on his boots are visible. Later, when Jack is shackled and then faces the kracken, the heels are higher - actually twice the height. Also, note the boots when he reaches the top of the building with Will and Norrington.
• The cloth with the key drawing changes greatly throughout the film. This includes the actual drawing itself, the tears on the cloth, shape of the cloth, etc.