At the near end, when Kirk Douglas is checking out of the hotel, through the double glass doors is clearly visible a 1957 Chevrolet rear 1/4 panel with it's fluted aluminum trim.
Camera change to the exterior of the hotel, Kirk Douglas exits and walks around to the drivers side of a 1956 Chevrolet which he drives away in.
When Karin is trying to draw Frank's attention, we see her unhook her bra (while obscured by bushes), remove half of her two-piece bikini suit, followed shortly by a shot of her bare back. When Jim Larkin covers her up with his shirt, we can see she is wearing the bikini top again. In the context of the plot, she would not have been able to put it back on, and the soldiers certainly would not have. (Though we never see her dropping the bottom, we can assume she did remove it at the same time, without that being presented.)
When the two officers are dismissed from the Courts Marshall by challenge by Kirk Douglas's character; as they leave they salute court. Soldiers don't not render hand salutes indoors; to salute indoors is accomplished by coming to attention, and or if carrying a weapon, presenting arms.
When the neighbor testifies in the court martial that he saw Karin standing naked in her bedroom, he told Major Garrett that he was 50 meters (164 feet) away. Yet, later when he sees her again, the distance from his window to hers appeared to be about 40 feet, at best.
At the end of the rape scene, Cpl Scott is third to leave. He stands against the tree while telling Jim Larkin to hurry up, and we see his shadow fall strongly on the tree, away from the river. As Scott walks away, we see his shadow primarily fall on the ground the other way, toward the river, and a slighter shadow falling away from the river, revealing the multiple light sources.