Corrected entry: At the beginning of the movie, when Mr. Smith comes home from work upset after losing a court case, Esther suggests that he make a career change. Mr. Smith responds saying he would like to play first base for the Baltimore Orioles. There was no baseball team in Baltimore until the 1950s.
Corrected entry: During the song "Ding, Ding, Ding Went the Trolley" sung by Esther, on the old VHS version, someone says "Hiya Judy." Judy Garland (Esther) seems to have heard it, but continues singing.
Correction: The person does not say "Hiya Judy", they say "Hiya Johnny". This is the reason she turns around and tries to get a glimpse of the boy standing with his back turned to her. When he turns around she says "stop, stop,stop", She then shakes her head to tell everyone on the trolley that that was not boy she is singing about.
Correction: The movie was made in 1944 - they weren't predicting the future. At the time the movie is set (start of the 20th century) the Baltimore Orioles was a separate team, which after moving and other changes ended up becoming the NY Yankees.
Oddly, in 1954, 10 years after the movie was made, the Major League St. Louis Browns became the modern day Baltimore Orioles.