Deliberate mistake: The rail line was supposedly not used in 30 to 40 years, however, in the exterior scenes approaching the bridge where the mile markers were, the tracks are well maintained, has no vegetation, and the rails are shiny, indicating a lot of train use.
Deliberate mistake: The majority of the Japanese planes were actually done-over North American AT-6 Texans and their Navy counterpart, the SNJ.
Deliberate mistake: Its obvious at the concert that there is no audience in the venue and that the crowd noise is just sound effects.