- Acting for Two:
- Peter Sallis voiced Wallace and Hutch.
- According to Nick Park, some of Wallace's lines were actually recorded by Ben Whitehead, who also voiced Mr. Leaching. Whitehead went on to voice Wallace for specific projects whenever Sallis was unavailable, and became the character's permanent voice in 2010 when Sallis retired from acting altogether.
- Completely Different Title: In some regions of Latin America the film is titled "La Batalla de los Vegetales" ("Battle of the Vegetables").
- Creator Backlash: While neither had ever spoken ill of the film, Nick Park and Peter Sallis have separately stated that the characters of Wallace and Gromit work much better in shorts than in a feature.
- Cross-Dressing Voices: Mark Gatiss as Miss Blight.
- Deleted Scene: One from the beginning of the film. It involved PC Mackintosh coming across a poster for the vegetable competition when walking down the street, and remarking the citizens as "vegetable mad". DreamWorks Animation apparently forgot to inform the merchandisers, though, as some storybooks and similar promoting the film mention the scene as if it were in the final movie.
- Dueling Movies: With Corpse Bride, another stop-motion film starring Helena Bonham-Carter. Although if Word of God is anything to go by, both parties were very supportive of one another.
- Executive Meddling: This film was really where Aardman began to feel the pressure from DreamWorks Animation which would eventually lead to them breaking off their contract two films early. Jeff Katzenberg pushed Nick Park to "Americanize" some aspects of the film, such as the designs of Wallace's car and even replace Peter Sallis with a more famous American actor. He also wanted the film to have Denser and Wackier humor in the wake of the success of Shrek. Aardman politely but firmly dismissed these suggestions, eventually compromising by casting well-known British actors like Ralph Fiennes and Helena Bonham-Carter, while keeping Sallis in the title role, and toning down the British accents. They also re-dubbed every mention of marrows to "melon", in the US release, because DreamWorks thought most Americans wouldn't know what a marrow was.note
- Extremely Lengthy Creation: The film took five years to make. Production started not long after the release of Chicken Run.
- No Budget: The budget for this movie was only $30 million, the smallest budget in DreamWorks Animation history to date.
- Orphaned Reference: The "veg bad" spiel that Wallace gives to the rabbits in order to brainwash them is meant to completely echo the "cheese bad" spiel he gives to himself when the Mind-Manipulation-O-Matic first appears. Notice that he doesn't show any interest in cheese after that moment for the rest of the film. In the final film, Lady Tottington's call interrupts him just before he turns the machine on.
- The Red Stapler: The Stinking Bishop cheese is featured in a plot-critical moment. Sales of this niche culinary product rose by 500% after the film was released.
- What Could Have Been:
- Originally, Wendolene from "A Close Shave" was supposed to return with Wallace as her gardener, but as production moved on, she was replaced with Lady Tottington.
- Originally, the design for the Were-Rabbit was much more ferocious-looking and bigger, but was toned down to make it less scary.
- At one point, Wallace would have written a song for Anti-Pesto, which he would have sung early in the Film, and later in bed. Some lyrics in the Song would have also referred to their window cleaning business from "A Close Shave".
- One version of the ending would have featured Lady Tottington marrying PC Mackintosh.
- One version of the ending had Wallace left with the rabbit ears after changing back from the Were-Rabbit, necessitating Wallace and Hutch going through the Mind-Manipulation-O-Matic a second time to change Wallace back and leaving Hutch a normal rabbit again. (This is why Lady Tottington's mouth movements don't match when she says, "The Rabbit's gone," as her original line, "In Bunny Heaven" was redubbed.)
- The 24-carat trophy joke was a last minute addition. It was originally a silver trophy, since traditionally silver bullets kill a werewolf.
- The Victor Quartermaine character was once known as Tristrum, and was originally written into the script as Lady Tottington's son.
Trivia / The Curse of the Were-Rabbit