Oona's opening scenes in the cave (when she's first shown as a human) are out of sync with her voice.
The imp statue on the table comes to life twice after Lilly passes the table. It also seems to disappear completely from the table between takes when Lily is opening the jewelry box.
In the credits, Lily's name is spelled Lili, as well as on the Jerry Goldsmith soundtrack. In the U.S. version, in the blurb at the beginning, her name is spelled Lily, as well as in the Scene Selection on the DVD.
When Oona reveals her humanoid form in the treasure cave, her eyes are brown. When she reappears in this form in Darkness' lair, her eyes are a striking light blue.
Crew or equipment visible
After Meg Mucklebone bursts out of the water and says 'Foul tasting fairy!', you can see the rigging and harness supporting actor Robert Picardo along his pelvis and back.
Towards the end of the director's cut, where Lily places her ring onto Jack's finger, you can clearly see the camera's lens in the ring's silver reflection.
When Jack is wearing a cloak you can see a safety pin several times when the wind blows it.
Jack states "We must get the alicorn back" after confronting and begging forgiveness from the remaining unicorn. An alicorn is a winged unicorn.
In the U.S. version, the scene when Jack kisses Lily as she's lying on the ground is used twice, once in the beginning, then at the end, when he puts the ring on her finger, leans down, and kisses.
Throughout the movie, the Unicorns have mismatched genders. It can clearly be seen when the animals rear up in the air. One example of this is when Brown Tom is guarding the "mare", and Lily trudges through the snow, frightening the horse.
When Princess Lily releases her bird at the beginning of the movie, it just falls over on the grass.
The fishing line holding the tiny light bulb which is meant to be Oona is visible when she circles in front of the bonfire around Jack in her introductory scene