Audio problem: In the "Candyman" song near the beginning of the movie, the candy store owner is on a ladder, about to drop candy into the kids' hands. When we see the kids holding up their hands and saying, "Me. Me.", none of their mouths are actually saying anything. (00:04:00)
Audio problem: At one point near the end of the movie, you can hear Tzeitel's baby crying. Watch closely, and you'll see that the baby's mouth is not moving. It's even closed at times.
Audio problem: When Professor Brown and Miss Price are eating, he asks, "Why are you so interested in that?" His mouth doesn't move in sync with the words.