Audio problem: During the scene right after Anton runs into the scarecrows in his house only to find out they are his deceased mom and dad, you see him run out to his porch and begin throwing up into his bushes. You can hear the sounds of liquid hitting the bushes, but you see nothing coming out of his mouth (there is enough light in the film to determine this).
Audio problem: When the alley cats are chasing Stuart and he's trying to start his car, he says "Come on" but his lips don't move at all. On top of that, wherever we see the cats running or from a distance, their mouths don't move at all when they talk.