In an early scene when Ollie Miller stumbles through the window at Condon's home, he falls completely inside. However, as soon as Nick gets there, Miller's feet protrude out over the bottom of the panel.
When Tanaka accuses Iris of treachery, she stands up from her chair and faces him, positioning herself away from the chair and closer to the sofa. As he leaves, she is seen back closer to the chair and turned so that she is now facing the opposite direction.
Right after Ollie Miller gets shot, he stumbles to the ground. When he gets up, under his left elbow, there is carpet moving where there should be grass.
In the opening credits, the copyright is "MCMLXV." which is 1965. The film was produced in 1945, so the copyright should read "MCMXLV."
During the fight Condon versus Oshima there are various and obvious mismatchs between audio and visual actions.