Continuity mistake: In the scene where Sabrina and Paul are sitting at a table in a cafe, when the camera is on Sabrina's face, behind her seems to be a perfectly dry and generally sunny day in Rome, but when the camera is on Paul, behind him shows people walking around with umbrellas and the ground is very wet.
Continuity mistake: In the scene where Salem and the guinea pig are eating on the table, the guinea pig's eyes are white. Later on in the film, in a scene with the guinea pig, his eyes are black.