When Szpilman watching situation on street from his 2nd shelter, one of captured couple start running from soldier. The man apparently escaped, but woman was shot to her back. It took couple seconds from shot until she finally dropped to her knees and lean forward dead, so from the camera viewpoint the blood stream on her back should draw number "7", not a straight line slightly upward (agains gravity).
Incorrectly regarded as goofs
Szpilman walks in formation along the street with a group of Jewish workmen. A German officer selects various men and executes them one by one by shooting them in the head. As the last man is shot, the hollow sound of a spent shell casing striking the ground is heard, but a complete cartridge with the bullet falls to the ground. A closer look will reveal it is actually a spent blank cartridge.