Continuity mistake: When Bugs Bunny pokes the Big Bad Wolf in the eyes, you can see there are pink bed clothes in front of the wolf, but in the next shot the bed clothes have disappeared.
Continuity mistake: When the Big Bad Wolf comes to Grandma's house, the handle on the front door is initially on the right, but when the Wolf orders Grandma out of the house, the handle is now on the left.
Continuity mistake: When the Big Bad Wolf throws the case at Grandma, you can see the front door is closed but in the next shot it is now open.
Continuity mistake: At the beginning of the cartoon, the brick-house pig is originally the pig wearing the red shirt, but later on he's the one wearing the yellow shirt.
Continuity mistake: When the three pigs are reading a book at the beginning of the cartoon, the front cover has "Children's Stories" on the red rectangle, but in the next shot the words have disappeared.