Dove arranges to meet Hallie "the day after tomorrow", but when they meet, he says, "You look different, even since yesterday."
The jukebox in Teresina's diner is a Wurlitzer model 1015. The 1015 was a post-war model produced from 1946 through 1947 and would not have been seen in the Depression.
Beaumont, Texas is flat and almost swamp-like, not hilly and dry as depicted in the movie.