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 slams the door on the dollhouse after Tom attempted to catch him after his dress slips off, the blind in the top window is pulled right up but in the next shot it's now pulled down halfway.
Trivia: This was the first cartoon to use "An MGM Tom and Jerry cartoon" end titles.