Continuity mistake: Carl and Dupree are having a little party while Molly is at work. When Molly walks in Carl grabs a glass of liquor, and as it cuts back and forth to him it changes from a bottle, to a glass, to a bottle and back to the glass.
Continuity mistake: During the stickball game, a UPS truck is parked in a driveway but disappears and then reappears.
Continuity mistake: When Dupree comes outside with only pillows on, he lifts his hands up and yells for Mandy. Barely a second later his hands are back down covering his butt and front side.
Continuity mistake: In the dinner party with Molly, Mr. Thompson, Carl and Dupree, the number of crab cakes on the pan in the kitchen changes from two, to four, and then to five or six as the shots switch back and forth between the kitchen and the dining room. There's no time - or reason - for anyone to bring the crab cakes back from the dining room into the kitchen.
Continuity mistake: When Neal is doing push-ups during the football game, a red plastic cup disappears from the floor next to the piano bench.