During the prologue, there is shot of a foot knock over a bottle from the far end of the bed. In a later shot, the same bottle is rolling on the bedside as He and She have sex.
When the baby falls from the window at the start of the film, we see him standing on the windowsill looking out onto the street before it cuts to him falling, looking into the house, as if he were to have turned 180 degrees in virtually no time at all.
I'm going call it a continuity 'goof' even though it doesn't 'break the spell' of this movie (as if anything could!). When we first see the articulate, autophagic fox face to face it is wearing a collar with a bell hanging from it.
In the end titles, George Frideric Handel's piece "Lascia ch'io pianga" is wrongly listed as "Laschia ch'io pianga".