Other mistake: When Sam tries to bring Bugs down from the crows' nest/elevator, he pushes the "Up" button and brings it down.
Continuity mistake: When Sam crawls into the cannon, he enters head first. But after Bugs has lit the fuse and the cannon explodes, Sam comes out facing the opposite direction.
Continuity mistake: When Bugs throws a match down the powder room, Sam runs down to the room and you can see that his sword is on the deck, but in the next shot the sword has disappeared.
Continuity mistake: When Sam goes to the bottom right door at the end of the in-and-out routine, you can see that the handle is on the left hand side of the door, but in the next shot it is now on the right hand side.
Continuity mistake: When Bugs pushes the button to bring down the "Crow's Nest", you can see there are no words on the button panel, but when Sam pushes a button, the words "Up" and "Down" have appeared.
Continuity mistake: When we see Bugs dressed as Captain Bligh, there is a wooden sword on the mast behind him that disappears and reappears between shots.
Continuity mistake: When Bugs emerges from the hole covered in jewellery, the items of jewellery on his right arm change between shots.
Continuity mistake: When Bugs throws Sam's treasure chest out of his home, you can see that the chest is well away from the hole, but when Bugs emerges from his home covered in jewellery, the chest is much closer to the hole than it was in the previous shot.