All of the newspapers shown in the film share many of the same articles, with the same headlines and typefaces, despite being in different newspapers and spread across several weeks.
For some reason the windshield wipers have been removed from Edwina's car - possibly due to reflections causing problems.
The playbill poster for 'What Price Glory' shows that it's playing at the Saugerties County Theater. However, Saugerties is not a county, it's a town in Ulster County located about one hundred miles north of New York City. The film got the distance correct.
(at around 12 mins) When Pendleton's cop puts the cuffs on Stewart's wrists, the clicking sounds are notably behind the action on screen.
(at around 5 mins) Guy finishes talking to a doorman and goes to get back in his cab. A clear reflection of the boom microphone is visible on the taxi's windshield.
When Guy is instructed to come out for the play rehearsal, he answers in his regular voice, not with the Southern accent he's supposed to have, supposedly from being an Alabama native.