Early in film, the announcer is talking about a message received on April 9, 1950, and says "Not since the code message from Korea, announcing the crossing of the 38th Parallel, has a message meant so much." The Korean War actually started over two months later, when the 38th Parallel was crossed on June 25, 1950.
A map of Germany with its borders by mid 1939 (including Austria and the Protectorate of Bohemia-Moravia but Eastern Prussia and Danzig still separated) is on the wall of the American military police headquarters. Hardly a map displaying the Anschluss would be on the wall of an Austrian official building of any type on 1950 after the war.
Near the opening, we see the switchboard in the state department, with labels over the various patch-cord inputs. One of them is labeled "MANILLA" rather than "Manila."
The action takes place in April 1950. In a scene in a nightclub, a female impersonator uses the "Fasten Your Seatbelts..." line spoken by Bette Davis in All About Eve (1950), which was not released until October 1950.
When the Lockheed Constellation flies over Paris, it is shown flying between the Eiffel Tower and the camera by the Palais de Chaillot, which would be unlikely for real, and also mean the aircraft was not full size.