When the Inspector first comes to take Father Logan to the police station, the distance that the sliding door is opened changes between shots.
After the guests leave, Ruth begins tidying and her left arm is bare under a long band of her dress. When her husband enters in the room, her arm is covered with the dress band held between her left arm and her body.
When Pierre comes into her bedroom, Ruth sits on the bed with her right arm leaning on the bed. In the next shot, her right arm is extended on her right leg.
During Ruth's flashback, when she is waving to Michael William Logan, the women shown surrounding her change and/or disappear between the shots from the back and the shots from the front.
While Ruth waits for her husband beside the door of the city council, a thin old man enters and walks until the desk and then disappears between shots.
(at around 50 mins) Father Logan is shown returning from the war. He is wearing the uniform of a Regina Rifle Regiment officer. This regiment was formed in Regina, Saskatchewan, not in the French-speaking province of Quebec where Father Logan supposedly was living.
Wheen a mob is harassing Father Logan after his acquittal, he hits a police car window with his elbow and it shatters like a piece of plain glass, falling apart in large, jagged pieces. Since the 1930s, car makers have used safety glass to avoid exactly that sort of breakage.
Just before Logan accidentally smashes the car window when he's attacked by the mob, the window can be seen to have been "pre-cracked" to allow it to break upon impact.
When Father Logan walks up to the crime scene, there is a woman in the background laughing and hamming it up for the camera. Everyone else in the shot is very solemn.
When Ruth is watching the postman walk past her house, set during World War II, the cars parked on the street are all 1950s models.
When Willie calls Pierre from Inspector Larrue's office, he only dials five digits - not the six (or even seven) in use at the time.