When Larry and Curly try rotating Moe's body to twist his head out of the pipe, they rotate him counterclockwise, but in the close-up of his face it rotates clockwise.
The boys are loaded into and takeoff in a B-24 Liberator Bomber and then are dropped from a B-17 Flying Fortress.
The stooges end up in a German officers building and notice a box reading "hand grenades", only the sign is written in English. It should be in German.
Since they are in England with the Royal Air Force, cars would have the steering wheel on the right. The one they work on and destroy has the standard United States steering wheel on the left.
With Moe stuck in pipe after the boys heat it up and put Moe/Pipe in vice, Curly uses his natural voice instead of his Stooges voice when he tells Larry to pull Moe out.