Continuity mistake: Charlie has set up a "security system" on the right side of the bed. When a double slaps Lindsay's hand, she goes over to a chair on the right side of the bed and the security system has vanished completely. It reappears when she returns to bed.
Continuity mistake: In the first scene, Duncan is sitting to the right side (if we are looking at him) of the back seat of the station wagon. When they are taking the luggage out of the car, there are now bags piled up in the seat on the right side.
Suggested correction: Absolutely no telling how much time has passed between the two scenes. With them being on a road trip, they could have stopped for gas, food, bathroom breaks etc and moved the bags around at any time. Even Duncan could have just done it by himself mid-transit to make a little more room on the floor for his feet.
Continuity mistake: During dinner after the funeral Streep has a cigarette in her hand. The next shot her hands are together without a cigarette.
Continuity mistake: When Keisha shows the father the painting she made, the father places it on the table over the color palette. Then after Keisha screams in the father's face, the magazine is gone. He sprays her with breath spray and replaces the painting over the color palette. (01:07:00)
Visible crew/equipment: When Sonya is getting ready to get in the shower there is a shot from inside the bathroom of her in her bedroom, if you watch the closet closest to the bathroom door you can see the shadow of a nearby crew member cast on it, moving around. (01:04:27)
Continuity mistake: When they are discussing whose pinkie gets cut off, Vince grabs Craig by the neck and pushes him against the refrigerator. Craig is first shown pushed against the right hand side of the refrigerator, but whenever the camera is on him for the rest of the scene, he is shown standing against the left hand side of the refrigerator.
Factual error: Just after Spud gets suspended from school, his mum is looking through a property catalogue of London homes. All the telephone numbers shown start with 020 7. The film is set in 1991, and inner London telephone numbers at that time started with 071, not changing to 020 7 until June 1999.
Continuity mistake: Notice how Julie pumps her shotgun twice within a few seconds in the lab without once firing.
Continuity mistake: At the beginning of the film you can hear a kettle whistling. But when Alvin removes a teapot (not a kettle) from the heat the whistling stops, but when he puts in back on the heat about 5 seconds later there is no whistle. Alvin doesn't remove a whistle cap or turn off the heat. (00:02:30)
Continuity mistake: When Aaron throws the umbrella down it turns inside out as it lands on the floor. A couple of shots later the umbrella can be seen from above and it has turned right side out.
Other mistake: Throughout the film, you can frequently see many people's faces blurred, phone numbers blurred, store-fronts blurred, etc. This is because the production could not afford the rights to show these people, places and things, and simply blurred them out.