Revealing mistake: The paving slab Broomhilda falls onto and supposedly breaks is already broken.
Revealing mistake: You can see that a huge rectangular hole has been cut into the ceiling of Latrines boudoir and filled in with balsa wood for when Rottingham gets catapulted through.
Revealing mistake: At the start when the fire arrows are hitting the hay roofs, you can clearly see wet patches of petrol or kerosene on the roofs, so that the fire can ignite quickly.
Revealing mistake: During the banquet scene, Robin slams the heavy carcass of a wild pig onto the table in front of Prince John. But throughout the fight, when the Sheriff and John are hiding, the carcass of the pig is being moved with the slightest movement as if it's hollow. A real wild pig of that size would not be moved so easily.
Revealing mistake: When Blinkin falls out of the look-out post and crashes into the large tree, you can see it wobble.