Against the wishes of director Kurt Wimmer, the film was completely re-edited by the studio after they saw the original version which they apparently did not like; they saw it as 'too emotional' for the action film they were expecting and re-edited it so there would be more of an emphasis on the action and to cut it down to a PG-13 rating. The edition shortened the film from its original length of 120 minutes to 88 minutes. The director was quite angry about the edition, and many fans agree that it lowered the quality of the film significantly.
Shipped to cinemas under the name "Female Warrior".
In the theatrical trailer, when Daxus punches Violet's hologram, the gun he is holding has been digitally removed from the scene (it's there in the movie).
The invented language used in the film is called Thaihindi.
The production notes state that Kurt Wimmer was "inspired to retell John Cassavetes cult classic Gloria (1980) as a comic book action-adventure." Gloria tells the story of a beautiful gun-toting woman who rescues a young boy from the mafia.
In the beginning, when Violet is escorted into the building, the corridor is painted in yellow and black bands which seem to form 6 roughly equilateral triangles of alternating yellow and black: the "fallout shelter" symbol. This is not, as previously stated, the logo of the Umbrella Corporation. The Umbrella logo is eight red and white isosceles triangles forming an octagon.
Director Trademark: [Kurt Wimmer] the muzzle flash on Violet's Uzi-like submachine resembles the biohazard symbol, similar to the way in Wimmer's previous movie Equilibrium (2002), that John Preston's guns have muzzle flashes that resemble the Tetragrammaton symbol.
Milla Jovovich's character uses a more authentic variant of "Gun Kata", a unique blend of gunfighting and martial arts developed by director Kurt Wimmer for his previous film Equilibrium (2002).
While on the set, Kurt Wimmer asked Milla Jovovich to punch him, in order to get a feel for the intensity she was putting in her action sequences. For the next several days, Wimmer directed the film with a black eye.
Long before the release of the film, a teaser trailer and a rough cut of one of the action sequences leaked to the Internet after being shown to a small group. Kurt Wimmer requested that all clips be taken offline in order to keep the film mostly a secret until he decided to let it out of the bag. The clips were apparently all removed.
Director Cameo: [Kurt Wimmer] as the "speak-no-evil" phage (out of the three) shot by Daxus during the "coffee shot" scene. Wimmer also "died" as a cameo in Equilibrium (2002), a previous movie.