When the young prisoner is forced to strip naked and is pulled out of the line of prisoners, his pants are only pulled down to his knees. When the camera angle changes, as the rest of the prisoners start marching away, the young solder is completely naked with all his clothes behind him.
While walking at night across a plain field of snow, with just the moon as only source of light, Forell throws three different shadows.
Forell's daughter is looking at a post 1991 map, it shows boundaries of countries that did not exist as independent entities during the 1940s-50s, such as Croatia, Ukraine, Czech Republic, Latvia, and others.
(At 1:19:00) There is a picture of Mikhail Kalinin (Chairman of the Presidium of the Supreme Soviet) in the inspector's office. It is presented as a portrait of someone who was then in office, but Kalinin had died 5 years earlier in 1946.
(At 1:42:06) The car on the background labeled ZIS-157 is a 1958 model.