(at around 59 mins) When Tripp cooks dinner, he puts an artichoke in a boiling pot. When he serves dinner, there's not a single artichoke on the dinner table.
The young boy in the movie, Jeffrey, is missing his two front teeth. In the final scene of the movie, suddenly his two front teeth exist.
Towards the end of the movie when Tripp and Paula are having the conversation with Tripp tied to the chair, Paula's make-up keeps changing. She has different eye make-up and different lipstick color.
(at around 16 mins) The shots of Tripp with Mr. Axelrod and of Mr. Axelrod first walking toward the boat were clearly shot later in the day from the other shots in the scene.
(at around 30 mins) At the end of the paintball scene, Paula's jacket goes from being on to around her waist as she walks towards the guys.
(at around 1h 12 mins) Towards the end of the movie we find out that Ace bought his house from his parents to avoid having to pay the inheritance tax when they pass away. The Federal inheritance tax in 2006 was on inheritances starting at $2 million. There are state inheritance taxes as well, but Maryland, where this movie is supposed to take place, exempts direct descendants of those receiving the inheritance from the tax.
(at around 27 mins) When Tripp is showing Paula how to shoot the paintball marker, he is clearly rolling the trigger with the marker not shooting, apparently not on, but in the next shot when Paula gets the marker, she shoots Ace in the foot. Since the marker is electric, you have to cut it on to shoot it. You couldn't see either one of them cutting the marker on. Without cutting it on, Paula shooting the marker would actually be impossible.
(at around 1h 24 mins) The coffee shop patrons watch the real-time showdown between Tripp and Paula on the jumbo screen via Ace's laptop as a series of shots, which is impossible.
In the closing scene, the sails on the boat are up while the boat remains motionless.
(at around 1h 21 mins) Some shots of the surveillance video have "TCG" plus numbers at the bottom of the screen. TCG stands for "time code generator" and is only created in post production, as in an editing program. It would never appear as live video. From the format, it appears to be generated by the Final Cut Pro NLE software.
The same car is used by both Demo and Kit, when it is supposed that they each own their own car.
(at around 23 mins) When Tripp and Paula come back from a date, they go to Paula's house and see Kit on the balcony. Kit is supposed to be nude, but you can see that her chest is covered through the branches.
(at around 1h 30 mins) When Al and Sue are cuddling, the body stocking that Kathy Bates is wearing is obvious (between her arm and her neck/face)
(at around 18 mins) When Tripp, Ace and Demo are in the woods, you can see one of the characters swatting at a mosquito. The microphone shouldn't be able to hear it; only he would if it was that close to his face.
(at around 24 mins) When Tripp is showing the boat to the couple, a reflection of a person sitting (wearing jeans and work boots) in a director's chair is showing on one of the boats.
The movie supposedly takes place in Baltimore, MD, yet when they go to Ace's house, there are palm trees in the yard.
(at around 51 mins) The movie supposedly takes place in Baltimore, MD yet they go to a New Orleans Zyphers-Omaha Royals baseball game. The Royals never visit the East Coast.
(at around 23 mins) When Tripp is talking to the couple about power versus sail boats, they hold coffee cups from CC's, a chain of coffee houses only found in Louisiana and neighboring states.
(at around 1 min) On Tripp's car there is no front plate. In Maryland where the film is set, there are license plates on the front of every car.
(at around 52 mins) The BB gun used in the film is a Red Ryder as produced by Daisy. There is a reference to "pumping" 2 times, however, this is a simple weapon and can only be "pumped" one time.
(at around 32 mins) During a sailing scene, a discussion involving nautical terms refers to turning a sailboat as "jibing" and "coming about" which is in part incorrect. Rather, this discussion should describe the two ways to come about: a "jibe" which is a downwind turn and a "tack" which is an upwind turn.
(at around 25 mins) The vet gives the dog the injection from outside the bandage with the needle inverted instead of through his IV.
(at around 1h 29 mins) In point of fact, the Miss Paula is a "ketch" i.e. two masts, the rear-most of which (mizzenmast) is set ahead of the rudder post. Boats of this type most often exhibit strong "weather helm" - a tendency to turn into the wind and stop moving if the tiller/wheel is left untended. Such is the case after Tripp is knocked overboard.