Continuity mistake: Look at Giselle's right arm when she falls on Robert after stepping out of the shower. In the initial shot, that arm is on the floor. In the next, she's using that arm to hold her towel in place.
Continuity mistake: After receiving the phone call from Nancy, when Robert and Morgan are talking in the taxi, his seatbelt repeatedly changes from over to under his trench coat collar. (00:16:45)
Continuity mistake: When Giselle opens the window in Robert's apartment, in the exterior shot, to sing for furry cleaning help, there is a set of three windows to her right, with a balcony. Odd thing is, in the interior shots the window she sang from is to the left of the couch, but to the right of the couch there are three French doors, not windows, that open to the balcony. (00:25:20)
Visible crew/equipment: At Robert's apartment, when he and Morgan stand by the window just as Edward takes Giselle's hands and later kneels, the actors' two T-marks are visible. The pink marker was for Giselle in the previous shots, and Robert and Morgan stand behind the orange marker. (Only visible on fullscreen DVD.) (01:09:35)
Continuity mistake: When Giselle, Robert and Morgan are at Bella Notte's, on their table the pizza pan sits atop a chrome stand. In some shots the stand has a chrome cross bar, between its side legs at the base, and in other shots that cross bar is gone. (When setting up for the shots within this scene, the props guys simply turned the stand upside-down sometimes, which resulted in the cross bar either being on the table, or directly under the pizza pan thereby disappearing.)
Factual error: When animated Giselle begins to sing and brushes her hair, the reflection of her "one true love" is visible in the mirror. Problem is that its image is not reversed in the reflection. (00:02:00)
Continuity mistake: After Morgan smacks Robert with the pillow to wake him up, in the shot from the bedroom, she runs past the bedroom doorway pulling his left hand, but next shot, from the hallway, she's now pulling his right hand. (00:28:30)
Continuity mistake: After the turtle gives animated Giselle the red rose, she places it on the jacket of her "one true love". In the following shots, the rose repeatedly disappears and then reappears, particularly in the close-ups. (00:03:10)
Visible crew/equipment: At the apartment, after Giselle falls asleep on the couch, when Robert says, "Just because she has on a funny dress, doesn't mean she's a princess," and a few shots later, when he stands to call for a taxi, the side of the camera and the boom mic are reflected in the window to Robert's right. The boom mic moves in both shots, but the camera moves only in the second. (Only visible on widescreen DVD.) (00:22:10)
Continuity mistake: When Robert gets up in the morning to deal with the pest problem he has facial stubble, but when he gets outside after chasing Nancy in his pyjamas, he is nearly clean shaven. When he goes back to the apartment his heavy stubble is back again.
Continuity mistake: When the animated old hag pushes Giselle into the well, as Giselle begins to transform her only jewelry is a necklace, but when she lands on the manhole cover she is also wearing earrings. (00:09:40 - 00:11:15)
Continuity mistake: When Giselle tosses the sword and the tip catches Robert's sleeve below the cuff, in the following shots the position of its point through the sleeve keeps differing. Then, after Robert loses his grip and Giselle breaks his fall, as they both start to slide Robert's sleeve is intact, but in the next shot the entire sleeve suddenly disappears. (01:34:25)
Factual error: At the Kings and Queens Ball, the bandleader announces that the next dance will be a waltz, which are, by definition, played in 3/4 time. However the tune that is played is clearly in 4/4 time and thus is not a waltz.
Other mistake: In his search of Giselle, when Edward knocks on doors 209 (hissing cat), 405 (barking dog), and 714 (purple guy), the funny thing is that in all three close-ups the three door jambs/trim have the same paint glob markings. The actual doors were changed, but the jamb/trim remained the same for all three shots. (Only visible on widescreen DVD). (01:04:05)
Continuity mistake: The first time we see Robert with the arguing couple, the woman puts her finger to the side of her head in a side-on shot of her, and in the next (a more front-on shot) her hand is suddenly on the table.
Continuity mistake: During the cleanup, when Giselle opens the center French doors and stands on the balcony to sing, the window she sang from earlier is directly beside the balcony, to the right. The problem here is, in the interior shots there is a wall that is about 7-8 ft wide, between the French doors and window, where the couch is. (00:27:10)
Continuity mistake: When Giselle falls off the billboard platform, as she hangs onto the ledge in the close-ups the metal surface is completely dry, whereas everything else is wet from the pouring rain. There is no canopy protecting the platform. (00:19:00)
Other mistake: In the song, Happy Working Song, that Giselle sings while cleaning the apartment, she references cleaning the hair clog from the "shower" drain. But in the bathroom scene shortly after, she doesn't know what a "shower" is, so she should not have used that exact term earlier.
Continuity mistake: During her first morning at Robert's apartment, Giselle has made a gown out of the living room draperies, but the remaining drapes on the windows are a very faded turquoise floral and the color of Giselle's dress material is a bright turquoise floral, which is actually more similar in color to the lamp on the table. (00:32:00)
Visible crew/equipment: When Giselle is up on the Palace Casino billboard platform, after Robert shows up she says, "I was wondering if maybe you," and we are able to see under her huge hoop skirt. There are at least three long wide safety straps dangling behind her thighs, which are not in previous or following shots when we can see under her hoop skirt. (00:18:50)
Chosen answer: Originally, she was scripted to have a few scenes with Nancy, Robert's girlfriend, in the design studio. The film's producers deleted some of those scenes. You can see that in the DVD under deleted scenes, where she has a slightly bigger part and actually has a small conversation with Nancy about Robert's text message apology.