Continuity mistake: When Lulu lands on the book, before the drawing of a donkey attacks her, there is a wooden sign hanging that says school. The edges are quite jagged. After a bit of singing from the school house, another shot of the same sign shows it much less jagged. The style of the letters also change as well, and the metal part of the sign holding the sign to the post. (00:04:05 - 00:05:45)
Continuity mistake: In the "Mickey and The Beanstalk" segment, the Golden Harp is locked inside a chest and has 19 strings. When she is on the table and singing to Willie, she has only nine strings.
Continuity mistake: Pearl is singing a song to mock her boss at the factory. She goes through the first lines about being too worn out "to play." With her feet on the work table, she puts her hand under her chin. In the background, a fellow seamstress is watching. In the next shot, her arms changed position, now crossed in contrast to the previous shot. (00:04:40)