Continuity: Ben Affleck has a large tattoo on his right shoulder/bicep that has been covered up by make-up for the movie. During the 'waterpark' scene Ben is wearing a T-shirt and when he scoops the little boy out of the water and lifts him into the air the sleeve of his shirt pulls back a little and you can clearly see the bottom of his armband tattoo.

Continuity: In the scene where Abby is about to make her "big realty deal" she has her hair in a pony tail with a piece of hair wrapped around where the rubber band would be. At first her hair is sticking up, pretty noticeably, then a couple seconds later, it's perfect and not sticking up, then sticking up again.

Continuity: Abby's hair colour changes between two different shades throughout the film, one much darker than the other.  The most noticeable instance: In the scene where she and Ben's character make love for the first time, it changes from light to dark between his living room and the bedroom.

Continuity: In one scene, Gwyneth and Ben are sitting outside at a table. She is smoking, telling him she smokes to quit the nicotine chewing gum. The tin of diet coke on the table changes position the whole time without her ever taking a sip.

Continuity: During the waterpark scene, Ben Affleck's character is shown going down a waterslide with his t-shirt on and it is getting wet.  In the very next scene, he is shown again, but the t-shirt is dry.

Continuity: If you look closely, Gwyneth Paltrow's hair changes from day to day. She changes her hairstyle a year after her husband dies, but from then on it goes from dark brown with dark brown defined eyebrows, to light brownish blonde with barely defined brows like every other day.

Continuity: After a big realty deal, Abby and Buddy are eating sandwiches. Buddy takes a bite out of the right side of his sandwich. When the scene goes back to Abby, the bite is out of left side.

Continuity: In one scene Abby is wearing a white collared blouse with a tan collared jacket over it. The blouse collar keeps moving from the outside of the jacket to the inside of the jacket throughout the whole scene.

Continuity: In the movie she says that her husband has been dead for more than a year, but when the woman shows up with the tape, it reads Dec. 17, 1999.