Continuity mistake: When Snow White falls asleep on three beds, the rabbits sleep on one more and the deer on another, making 5 beds occupied, but when the dwarves come back three more beds of animals wake up making a total of 8 beds. In a previous scene Snow White looks at the 7 beds with names, not 8!
Revealing mistake: The film contains a few animation glitches which usually only last a frame or two. These could have been fixed during the film's digital restoration, but were left in, presumably because the restorers didn't want to alter a single detail of the original animation. A prime example occurs when Snow White is leading the animals to the Dwarfs' cottage. As she approaches the door, a fawn steps in front of her, and its head completely disappears for one frame.