Isn't the thread asking about goofs in animated films, not TV episodes or direct-to-video titles?
Bambi:
1. A distant flock of crows fly up out of the woods once, then pop down lower and fly up all over again during a dissolve. This is likely because the required overlapping footage wasn't animated to cover the length of the dissolve and the lab thus had to repeat footage.
2. An opossum mother and her two babies, hanging upside down, greet Bambi. He turns his head upside down and we get his POV of them hanging "up", but the babies are now on the wrong side of the mother. The image was animated as flopped instead of rotated (and due to the direction the characters are looking, there is no way to correct it without reanimating).
3. When animals swim across a body of water to take refuge on an island during the forest fire, an animal (an opossum or raccoon, I think) pops into place out of nowhere (or pops out of existence, I forget). This was corrected on DVD.