Napoleon Solo and Lavinia Brown are nearly drowned. When they emerge from the pool, they are completely soaked and Lavinia's hairdo is ruined. After the take off in pursuit of Nazarone, Lavinia is suddenly completely dry, with her pleated skirts in perfect order and her hairdo restored.
Illya jumps into the water to save Solo and Livinia. Despite the fact that she is completely bound you can see that Livinia has no problem escaping the bindings by herself.
There was no Gran Prix in Cannes; the actual one on the French Riviera has always been in Monte Carlo.
On at least one instance Le Gran Prix is misspelled as "Le Grand Prix".
When Solo and Kuryakin are siting in the restaurant, Kuryakin holds his chin in his left hand and David McCallum's wedding ring is shown.
When Solo and Lavinia Brown are tied to the mattresses and pushed into the swimming pool, the guide wires suspending them are clearly visible.