When Alma is laying beside the pool and Mark approaches her, the dagger is in her left hand, but in the close up shot it's in her right hand.
When third victim is killed, gate of the pig pen is opened, but before it wasn't.
When third victims falls to the ground, her position isn't the same between the shots.
When killer arrives in Lisa's room, he rips Mark from the photo, but in his flashback, it's Alma who is torn from the photo.
Third victim already has a wound on her chest before the killer even struck her there.
When pigs go near the corpse, it's obvious it's a doll.
There are no exit wounds on the killer when he is shot.
On the second victim it's very clear that stabbed eye is just a painted eyelid.
Italian dub has some problems with synchronizing audio and what's shown. There is a scene where inspector is talking to the group, but nothing is heard for a few seconds, and also when daughter leaves father at flamenco, he talks, but his mouth doesn't open.
First shot in the nightclub, club goers are seen rocking out to a couple beats of low static before music kicks in.