Character mistake: In the scene where Kris's knowledge is being tested, he incorrectly gives the vice president of President John Quincy Adams. Kris states John Quincy Adams' vice president was Daniel D. Thompkins. That's wrong. John Quincy Adams' vice president was John C. Calhoun. Daniel D. Thompkins was the vice president under President James Monroe.
Character mistake: When we see the sign in the window of the music shop, it reads "This Week Dance Record" which doesn't make much sense. Surely it was meant to read "This Week's Dance Record."