Wandering Windows: At minute 1:30 there is an interior shot showing a wall more than 2 feet from the front door knob. At minute 9:47 there is an exterior shot of the same door with a set of stone framed windows no more than 1 foot from that doorknob.
When Chapman discovers the car down at the bottom of the embankment, he is shown up close with a house behind him. When the camera shows him at a distance on the hillside looking at the car, there is no house. The camera shows another closeup of Chapman with the house behind him, and again, the distant shot with him looking at the car and there is no house behind him.
The back of Karl Weber's jacket is covered with loose strands of grass when his character meets Lt. Tragg on a grassy hillside. Presumably Weber fell onto his back earlier, and his jacket wasn't swept off.
Helen Sprague agrees to meet Marie Chapman at the cabin at 9:00 pm. However when Greg Evans rides up to the cabin before discovering Helen inside waiting for her appointment with Marie, it is clearly daytime outside, and it is still daytime when they subsequently leave together.