(at around 43 mins) Mrs. Tofte is carrying a serving tray with glasses when she looks out the window. When she turns around and runs away, she no longer has the tray.
At 1:14:20 -water splashes onto the camera lens.
At 1:19:25 -the German soldier is wearing 21st century boots.
Throughout the movie, the sound from explosions can be heard instantaneously, even when they occur a long distance away. Bangs would be delayed in such cases, as sound travels at roughly 340 meters per second.