Continuity mistake: In order to tiptoe across the tacks without being hurt, Tom puts a metal gauntlet on his feet. At this point, you can see the floor is completely covered in tacks, but when Jerry and Nibbles are at the same spot a little later on, the tacks have disappeared.
Continuity mistake: When Jeannie is on the settee talking on the telephone, the cord is missing in some shots.
Continuity mistake: When Daffy is standing on the branch of the tree ready to jump off, he is holding on to a rope. When the camera angle changes to behind Daffy in the next shot, the rope is missing.
Continuity mistake: When Daffy rushes up to take his breakfast from Elmer, you can see the door behind them is closed, but when Elmer tells Daffy he's had enough, the door is now open.
Continuity mistake: When Bugs is climbing up the ladder, you can see that he has a toothbrush in his right hand, but when he enters the rocket ship, the toothbrush has disappeared.
Continuity mistake: When King Arthur says "A good idea, fool!", Bugs Bunny stops and you can see that behind him is a wall. In the next shot, Bugs is now in front of King's Arthur's chair, and when he says "Beheaded?" he is back in front of the wall again.
Continuity mistake: When Sylvester sucks the spaghetti into his mouth after thinking he has captured Tweety, you can see bowl next to him is full of spaghetti, but when he is clobbered on the head by the mallet, the bowl is empty.
Continuity mistake: When Elmer Fuddstone appears from his cave, there is a sign saying "Elmer Fuddstone" which was not in the previous shot.