At 1:20 into the movie Strago is loading two missiles to launch. The second missile has two conspicuous dents in the side of its shell. It is seen later as well.
When the spies are driving uphill on the cliffside dirt road and stop to ask for directions, there are four head-on shots of the road. The first and third shots are in a different location than the other two. The former include a more curved coastline and a red speed limit sign, while the latter has a more straight coastline and no sign. Also, the latter has the spies later driving into the same scene as they did a few minutes before even though they had just been seen leaving the scene in the same uphill direction as their arrival.
Early in movie (7 min mark), Solo and Kuryakin depart after talking with a Sicilian peasant. As their vehicle leaves, a crew member is seen behind the car stooping low - trying not to be seen.
In an overhead shot of the chase scene at the beginning of the film, the lower part of the helicopter filming the action is clearly visible.
When Napoleon and Illya stop to ask directions in Sicily, they drive into the shadow of the camera.
When Illya is first brought into the large round conference room at Stago's place, a shadow of the boom microphone is visible at the top of the frame on the curved wall above him.