The length of Jimmy Corrigan's hair, which is extremely close-cropped on the sides and back, varies greatly between scenes.
Wallingham's certified check is clearly dated 21 October 1933, but his steamship ticket, which he purchases afterwards, is dated 2 September 1933.
When Wallingham buys the Blue Anchor Steamship ticket, there is a calendar on the office wall that reads Friday the 6th. But the purchased steamship ticket reads September 2, 1933, which is a different date and also falls on a Saturday.
Two of the newspapers' front pages in the montage at the beginning of the film have the same headline and story of Jesse Owens choosing Ohio State University out of 28 colleges that recruited him out of high school in Cleveland.
At the steamship pier, there was a US Customs booth. However, both Wallingham and Joan went right directly on board without passing through customs.