When Danny first arrives at the highway intersection, the "Detour" sign laying on the roadside is clean. In subsequent close-up shots, the sign is covered with dirt.
While skiing with Janine, Danny's sunglasses fall from his sweater. Later, he's wearing them.
Many of the shots in the outdoor scenes alternate between sunny, clear skies and cloudy, overcast skies.
When the three women in the red, yellow and green dresses first enter the office before their faces are seen, the women in the yellow and green dresses have changed sides from when they were just outside the office door.
The shadows of the camera and crew are visible when Danny and Janine are riding the ski lift.