Other mistake: Throughout the film, the Hickams' phone buzzes. When Elsie throws the phone into the yard, it breaks to reveal a pair of bells.
Other mistake: In the ending credits of this movie, it says "Cast (in order of appearance)" and the first character to be mentioned is Rose, whereas, in the beginning of the movie, Dorothy is the first one on the screen, and, the first person who talks.
Other mistake: When Bill Gates arrives in Albuquerque, after Paul Allen says "It's not so bad when there's no wind" the subtitles say "oh yeah? what is that?" however the audio says "oh yeah? when is that?"