Continuity mistake: When Jerry appears from the hair of the toy lion, you can see that behind him there is a decoration and some purple baubles. In the next shot, the decoration has disappeared and the baubles are now much closer to the lion.
Continuity mistake: When we see from Tom's view the fridge he is going to crash into, you can see the cheese is on the second shelf, but when he crashes into the fridge, it has moved to the top shelf.
Continuity mistake: When Bugs puts up a "Camp Here" sign near his hole, you can see there is nothing behind the sign, but in the next shot a tree has suddenly appeared.
Continuity mistake: When Sandy is watching the chef toss hot cakes at the American Grill at the start of the cartoon, you can see there is a jug and some dishes at the far end of the counter, but when the camera pans in on the chef, the jug and dishes are now much closer to him.