When Andy and Veronica collide on the post office steps, her hat is completely knocked off her head and hanging just below her chin, but in the immediate close up it is on top of her head.
The opening narration states that, unlike men, who wore big mustaches at the end of the 19th century, women wore nothing on their faces. In fact women powdered their faces with rice powder, an article so useful that it is still employed for both makeup and cooking.
When Judy Garland's character is playing the harp there are no strings in the heart that she appears to be playing.