Revealing mistake: When Tom is startled to hear "Rock A Bye Baby" on the phonograph, the whiskers on the left side of his face disappear for a frame or two.
Continuity mistake: When Jerry emerges from the dollhouse wearing the doll's clothes, you can see the safety pin on Tom's diaper is pointing up, but when see Jerry strolling past him in the next shot, the pin is now lying face down.
Trivia: This was the first cartoon to use "An MGM Tom and Jerry cartoon" end titles.
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