Factual error: As Eliott walks across the hillside where the concert is taking place, you can see nylon dome and bivouac style tents. Tents made with metal poles and nylons didn't come to market til the 70s. (01:23:05)
Factual error: The large revolver used by Black Dynamite throughout the film appears to be a Smith & Wesson Model 629 Classic. The movie is set in the early 1970s, but this gun was not produced until 1990.
Continuity mistake: When Ronnie takes Brandy out to dinner, when she asks him what his medication pills are, he holds them out for her to read, and as the shot changes from him to her, the position he's holding the pills changes from being held upright, to upside down. (00:30:25)
Visible crew/equipment: In the scene where Buddy is driving Felix to his old friend Charlie, just when the car starts to move, a filming crew of three people and also the camera are visible in the reflection on the car. (00:49:10 - 00:51:15)
Other mistake: When Wes is running from the bad guys he hides in a St Patrick's day parade. No buildings that they pass have any St Patrick's day decorations or give any hint of this holiday, including the Irish bar they go into earlier.
Continuity mistake: When Marshall is colouring in his drawing of the Cheerleader the part of the skirt on his right is coloured in but when we look at it again he is just about to colour it in.
Continuity mistake: When Shavoo and Buddy arrive at the storage area, but before they open the cell, they clasp hands. The shot changes, and their hands are now down and no longer clasped.
Visible crew/equipment: Near the end of the film, in the parking lot, you can see the boom microphone in the upper left corner of the shot. This happens twice.
Continuity mistake: When Maynard is teaching Tony to shoot a gun, Tony fires three shots first. The gun's chamber closes as usual (meaning the gun still has ammo). We see a shot of Maynard, then flick back to Tony and the chamber is now open (meaning the gun is out of ammo). Tony then fires three more shots from an apparently empty magazine before being told to reload. (01:26:40)
Continuity mistake: When Vivian comes out on the porch with a bottle of soda, the level is way under the label. When she goes down the stairs the level is way over the label on the bottle. (00:42:30)
Continuity mistake: When Walter steps into the cat poo he gets it right under the middle of the shoe. When he then lifts his foot to take a look it's stuck under the front of the shoe with no sign of poo in the middle. (00:17:30)
Continuity mistake: Lyn has a patch on his nose and it's loose on one side. In the next scene it's attached tight to his nose again. (01:17:00)
Continuity mistake: When Sugar Bear flies through the air and lands on Truck at the end dance off, Trucks legs bend backwards underneath him. When Sugar Bear gets off of him, he's now flat but his legs are laid straight out instead of bent.
Factual error: Kevin and his buddies go to graduation in Army dress. While the ribbons displayed are hard to identify, several things are sure. They don't have a Washington National Guard ribbon, so they're regulars, and they have no Middle East service ribbons. So just where did they acquire so much fruit salad?
Factual error: When the Lincoln Continental Convertible was rolling backwards down the hill, Nick put his hands on the trunk to try to stop it. A car, especially one weighing 5,000 - 6,000 #, would easily knock over a person and possibly cause serious bodily injury (even death). Nick's attempt to stop the car by holding onto the driver's door handle would also be futile and potentially dangerous. (00:37:47)
Continuity mistake: After Paul tells Meryl that he was hesitant about adoption during their jogging, Meryl returns home. While jogging, she was wearing very tight grey pants. At the barn, her pants are a lot looser.
Character mistake: The opening shot of the movie pans across a fence supposed to enclose the hunting reservoir of the royal family of the fictitious kingdom of Vespania. Judging by the sign on the fence, the official language of the country must be EngRish; the sign says "Land Demesne We knownothing [sic] about FIRE!", citing also as source for these cryptic messages the "internal secuLity act of 1950." (00:00:01)
Plot hole: Mr. Cranston asks Denise to be the accompanist for the school's production of "Chicago". This is an error. In the year 2009, in which the film is set, this would be impossible since the licensing company which has the theatrical rights for "Chicago" restricts the show from being produced (even by amateur groups and schools) anywhere in the greater New York area while there is an open-ended production running on Broadway.
Factual error: At 01:29:08 we see Carys lying despondent on the couch in her living room surrounded by balled up tissues, empty food containers/soda cans and trash - all the signs of going through a bad break up. She gets up to answer the door for her mom, who has brought by a plate of cookies. Carys sits on the couch again, looks down, looks up, and by 1:29:40 the entire room is clean; we see her mom fluffing a pillow. There is no way her mom could have cleaned the living room in less than 32 seconds.
Other mistake: When Max is reading the note Mary left on the first page of her book, the words Mary speaks continue on the next page, but Max never turns the page.