When Day-Day is showing Craig his BMW, it is on the left side of the drive-way. But when Day-Day's ex-girlfriend spray's him with pepper spray, the car is on the right side of the drive-way.
When Uncle Elroy is showing Craig the backyard, he pulls a condom out of the jacuzzi and dumps the water out of it. In the next shot, when he tells Craig that he is welcome to use it, the condom is full of water and he dumps it out again.
When Deebo kicks his way out of Willie's truck at Joker's house, the door goes flying into the middle of the street. At the closing of the movie, as Willie and Craig are driving off in the same truck, the door is in place.
In the fight between Craig and Joker, Craig knocks Joker out of his shoe. The next shot the shoe is back on Joker's foot.
When Craig gets off the roof, it is dented. Moments later it is back to normal. Later, it is dented again.
The brick thrown into day day's windshield would've left a greater damage.
If Elroy's house was going to be auctioned off due to non-payment of back taxes, he would already have received notification long before the auction was to take place. In fact, he would already have been evicted from the house.
Roach gives Chico the dog a fudge brownie. He shouldn't have given him the brownie because dogs can't eat chocolate. It's bad and toxic for dogs.
As Deebo is getting bitten by Cheecko he is clearly wearing a pad.
The address on the tax notice and the address on the mailbox is different.
When Uncle Elroy is trying to free Day Day and Roach by cutting the duct tape, the tape already has a significantly large cut before Elroy even begins to cut it.
The house numbers on the mailboxes don't correspond to the numbers painted on the curb.
When Craig and Day-Day jump the fence at Joker's house (while Roach is distracting Chico), the "wall" shudders and is clearly a prop wall.
We hear ripping sounds as Baby-D pulls the sleeves of Day-Day's jacket in the parking lot but immediately afterwards, the jacket is fine.
Right before Craig punches Little Joker in the face when Day Day's father is on the ground hurting there is a crew member standing in the shed. When it shows the shed again he is gone.
Craig tries to hook up with Karla, but nothing is mentioned that he's already dating Debbie (established at the end of the first Friday movie)