Factual error: There are Velcro straps holding the pads on the blocking sled, and there is an end zone goal post with one base. Both of these items did not exist until the late 60s.
Factual error: The view from the aircraft Jane is flown home from France in shows the modified double engine pod of the 747 famously at Dunsfold Airfield, Surrey. Also a late livery grey RAF VC-10 parked in the distance. Also the engines of the plane she is in are upgrades and not right for the year it is supposed to be happening. (01:23:20)
Factual error: During Howard's "Thank You" speech to New York he gives NYC the gift of a live performance by AC/DC. The year was 1985. As the band takes the stage and launches into "You Shook Me All Night" we see Phil Rudd on drums. Rudd had quit AC/DC two years earlier and was replaced by Simon Wright. (Rudd returned in 1994, hence being part of the band when the scene was filmed).
Factual error: Julia Child's address on the envelope that she received from publishing company Alfred A Knopf contains a zip code. The envelope contains a letter informing Julia that Knopf wanted to publish her cookbook. That first cookbook, Mastering the Art of French Cooking, was first published in 1961. The US Post Office didn't initiate zip codes until 1963.
Factual error: On a number of occasions uniformed Wermacht officers and men are shown saluting Albert Speer. Speer was a civilian and (obviously) not in uniform. Military men do not salute civilians.
Factual error: A scene near the beginning of the movie when Forest Whitaker and Oprah are both speaking on different phones. The phone that Forest is using has a modular plug. The scene takes place during the Kennedy administration (early 60's). The modular phone plug was not patented and put into use until 1975.
Factual error: A 1950 Chevrolet and a 1950 Oldsmobile can be seen in street scenes in this supposedly 1944-set movie.
Factual error: Tommy is wearing a Hulkamania shirt while the band is being assembled together. The band was formed in 1981. Hulkamania didn't start until 1984.
Factual error: In a picture from the UN headquarters in New York in the year 2003 you see two German flags. The German Democrativ Republic hasn't existed since 1990. (01:16:04)
Factual error: Approximately three quarters of the way in to the film, there is a close up of a German soldier handing an officer a file of documents. The helmet that the soldier is wearing is a post war 1960s version. This can be determined by the lack of an air vent and rivet on the side of the helmet.