Continuity mistake: When Elmer catches Sylvester breaking his dishes, Elmer's position changes between shots.
Continuity mistake: When Yosemite Sam enters the saloon, there are swinging doors behind him. When he orders "all of you skunks" to "clear outta here", the other cowboys leave but the doors to the saloon have disappeared.
Continuity mistake: While fishing, Mr. Peabody hooks a mermaid who is swimming underwater. When he reels her in and she leans over the edge of the boat, her hair is completely dry and perfectly coiffed.
Continuity mistake: When the big dog points his gun towards the hole in the log, the length of the log changes between shots.
Continuity mistake: As he eats, a bread chunk rests on the table to the right of Oliver's bowl. As he rises, the bread is gone. (00:14:20 - 00:14:50)
Continuity mistake: When Sylvester (dressed as a cleaner) sneaks up on Tweety's cage to capture the bird, he puts his dustpan and brush next to the cage. But when we see Tweety standing next to the cage, the dustpan and brush have gone.
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 the turtle is looking at the dog for staying in his shell, the dog's nose changes colour from black to brown.
Continuity mistake: When Sylvester smothers grease on the stairs, he leaves the tin at the bottom. But when Elmer comes down the stairs, the tin has gone.
Continuity mistake: When we first see Bugs' rabbit hole at the beginning of the cartoon, you can see there is nothing around the hole, but when the camera goes down the hole in the next shot, grass has appeared.