While being gassed on the ferry, it's strange that the man doesn't even try to open one of the wing vent windows. They are simple hinged windows, and as the car's owner and driver he ought to know that.
A man tells Guido that he has hidden a gun in his right-hand pocket; yet, when he attempts to shoot himself beneath the table, he withdraws it from his left pocket.
When Guido visits the cardinal in the mud bath, the latter is seated in a chair, fully clad in his cassock, while two attendants hold up a sheet to form a curtain around him; yet when the camera cuts to a closer shot, he is suddenly bare to the waist.
When Guido visits Carla while she is ill, a strap from her slip vanishes in the close-up after she rolls over, yet it can be seen in the longer shots both before and afterwards.
