At about the 1 hour 40 minute point, there is a little league batter up to bat, and there are frequent shots of the batter, and then of the crowd, and then back again. Well, each time, the soft baseball hat, under the batting helmet gets turned around, first it is towards the front, and then it is turned around backwards, and then it is turned back to the front again. This happens like 5 times in a row.
After Col. Griff Carson arrives home at the beginning of the movie, there are a few scenes where he's wearing a t-shirt with the U.S. Marine Corp emblem visible on the front. He is in the U.S. Army, not the Marines.