Continuity: Several times it changes between day and night between shots. For example, Peter arrives in broad daylight when he rescues Eva from the Baron, but it is the middle of the night when he brings her to the dorm afterwards.
Plot holes: There is no explanation as to how Becker can move around the multistory castle in his wheelchair, even though there seem to be no elevators.
Continuity: The parchment with the incantation changes between different degrees of folding between shots.
Continuity: At the airport the uniformed airline employee greeting passengers at the base of the portable stairway suddenly disappears between shots.
Continuity: Eva's hairstyle markedly changes in a matter of minutes: from the dinner scene at Karl's house to just a few minutes later when she and Peter are inside the castle, her hair goes from a wavy perm to being nearly straight-combed.
Continuity: When Peter comes to Eva's rescue at the castle, it is clearly broad daylight. Eva begs Peter to take her home, which he does, but now as we see him drive up to her student dorm, it is pitch black outside.