On the uniforms of both Speidel and Kluge, their Ribbon Bars on the Left side keep appearing and disappearing during the movie. When missing you can clearly see the stitch holes where the bar should be.
When Field Marshall von Kluge arrives at Rommel's HQ he salutes Speidel and Speidel returns the salute. Speidel has a lower rank and should be the one who salutes first.
The movie starts with a car traveling through the woods and it shows the date October 14, 1944 in Germany. By the color of the leaves, all green, it looks like the middle of the summer and not the autumn in October at all.
Walter Model's uniform changes from shot to shot. At his arrival his Knight's Cross with Oak Leaves, Swords and Diamonds medal around his neck is missing. His trademark monocle also does not appear until his last appearance in frame, by which it is blurred.