At the fair when Bobby Joe throws the stuffed tiger at Sgt. Slaughter, it is moving downwards with sound effects of hitting the ground. In the next split second shot, Sgt. Slaughter has it tucked neatly under his left arm.
At the shooting gallery, in between bites, Bobby Jo's cotton candy is out of frame and suddenly loses half its volume. In Bobby Jo's later encounter with Lenahan, the cotton candy disappears altogether for the remainder of the scene.
During the golf sequence, the golfers are driving carts with steering wheels and no makers name on the front sections. But when they are lounging by the sand trap drinking beer, the cart in the background is of the handle steering type with the makers name on front. Sgt. Clay's golf cart has the steering handle for the entire golf sequence.
The window air conditioner in Sgt. Slaughter's office has been pulled from the window and into the set, exposing the rear, so the camera can frame Eustice Clay kneeling in front of it.
When Sergeant Clay puts a coin in Sergeant Slaughter's soda vending machine, a bottle comes out even though he didn't make a selection of the four varieties on display.
During the fight, Eustis gets knocked up against the jukebox, which moves like it were an empty cardboard box. BUT jukeboxes are big cumbersome instruments, full of records, making them extraordinarily heavy. So, a mere bump in a fight is NOT going to cause one to move quite so easily as the one in this scene does.
Sergeant Maxwell Slaughter's decorations indicate he is a combat veteran of two wars. Unless he rose up in ranks within 10 years (this movie's copyright is 1963), his ribbons and awards on his chest do not reflect the two Korean awards he should be wearing: the Korean War Medal for serving within Korea or Korean War Service Medal for serving anywhere during the conflict dates. Additionally, he also should be awarded The United Nations Service Medal for Korea (UNKM).
Master Sergeant Slaughter wears six hash marks on his left sleeve to denote that he had completed 18 years of service. On his right sleeve the five overseas bars indicate two and a half years in a foreign "hostile fire area". The patch on his right shoulder indicates prior war time service in the 24th Infantry Division which fought in the Pacific in World War II and also fought in Korea, so quite possibly Sergeant Slaughter's character was a veteran of both wars. The possible goof is that in the closing scene Eustis is in dress uniform wearing the Combat Infantry Badge but has no divisional patch on his right shoulder.
Eustis tells Maxwell of a plan to get penguins from the North Pole to use for advertising. There are no penguins at the North Pole.
On numerous occasions when the soldiers are indoors, they are wearing their hats. Military regulations call for the removal of one's cover when one is indoors. This is particularly noticeable when the Major and Captain come in from the rain. A sergeant is working at his desk and has his cover on, and neither the Major nor the Captain remove their covers upon crossing the threshold of the building.