Continuity mistake: Towards the end when Debbie and Danny get into a fight around 5am at their apartment, Debbie packs some things and goes over to Joan's apartment to mull it over with her. While they're talking with Joan in her robe, Joan's hair goes from being up in a hairband (not even visible out of the hairband) to her hair being down and styled with no hairband at all and then back to up to not visible in the hairband again.
Continuity mistake: During the scene where Zac Efron is talking to his girlfriend for the first time in the cafe, the reflection of her in the window does not match what she is doing in the scene. (00:25:30 - 00:25:35)
Continuity mistake: In the night-of-the-broken-trophies scene, take a look at the trophy Augustus hands Isaac first. The 2nd time he smashes it against the wall, it is a different trophy. (00:23:25)
Continuity mistake: Maddie and Taylor are talking about Maddie being over her previous fiance (that Taylor knows of). Taylor has the hair on her right side tucked into her jacket, but next time the camera is on her, her hair is neatly arranged over the shoulder. Similarly, her hair on the left shoulder changes position between shots just before Maddie drags her out to meet their plus-size friend. (00:06:20)
Continuity mistake: Salma Hayek comes out of a Rolls; keep an eye at the area between doors, right next to the rope. During the brief cut on Brosnan putting down his helmet, a woman with a greenish-black dress is leaning against the wall as if she's been there the whole time. (00:06:05)
Continuity mistake: During the scene of the first meeting between Gus and Ruby, Krysten Ritter's hair moves back and forth (behind or in front of her left shoulder) between shots multiple times (most obvious example: when he offers her a drink). (00:12:45 - 00:14:35)
Continuity mistake: After David hits Hugh he gets a wound on his mouth which gets smaller the next day.
Continuity mistake: Throughout the film, Nicole Kidman's hair changes color. In one particular dinner scene, her hair is everything from light blonde, to dark blonde, to red.
Continuity mistake: Jay is mopping the floor after promising on the phone to his dad that he'll bring his non-existent fiancee to the wedding. He tries to talk one of the nurses into joining him. While doing so, he stands before her leaning on his mop with his left hand on top, which switches to the right hand between shots. (00:06:40)
Continuity mistake: As the two assistant workers walk away from the prison building at the end of the first day, Charlotte Gainsbourg's grip on her folders switches between shots.
Continuity mistake: Carrie's height changes constantly.
Continuity mistake: In a scene at a night club, Colin Firth's friend has a glass of red wine in his hand and then he has a glass of white wine.
Continuity mistake: The appearance/structure of the ground-level components of the well changes several times. In the first view, the unit is mostly gray and rusty with one vertical white pipe. When Ernest is pumping, half of the horizontal pipe is also white and clean. In the rear view, the vertical pipe is brown and rusty. Some mud spurts out of the spigot, but the spigot is clean, dry, and white in the front view. (00:05:10)
Continuity mistake: When Hugh Grant writes "Protagonist" on the board, the writing changes depending on the shot, most noticeably the G - sometimes it looks a bit like a backwards question mark, other times it's so slanted it looks more like an S.
Continuity mistake: When we first see the male volcano, he is an entire island with trees and forests. After many years have passed and sinks into the ocean, it can be seen the trees and forests have now gone. However, after he spews out of the ocean and is together with the female volcano, the male volcano suddenly has trees and forests around him again.