Continuity mistake: When Pinkett and Murphy are at that restaurant/comedy club and the guy with the dreadlocks is making fun of everybody (this is the second time they go to this place) when the show him from the front his hair is sticking straight up but when its from the back it's down.
Continuity mistake: At the first family dinner scene, grandma starts coughing. The camera shows her from the front with a glass of water to drink. The camera then switches to the side and shows her with a glass of coke in front of her. Her daughter says "Momma drink some water" and suddenly it turns into a glass of water again.
Continuity mistake: When Sherman's new attraction walks into his classroom, you are able to see in the background that the same people walk past the classroom door several times.
Continuity mistake: In this movie, there are two times when Sherman Klump feeds Molly the hamster. They occur during the beginning and the middle of the movie. The first time, Sherman is wearing a brown coat, and you can see it slightly when he gives Molly her food. The second time he feeds her, he is wearing a cream-colored sweater, but as he extends his arm out, his wrist shows that he is still wearing that brown coat. They simply duplicated the first feeding scene instead of filming a second one.
Other mistake: When Klump is being replaced by Buddy Love, and the guy is putting the new name on the door, it doesn't make sense that the name is readable from the inside of the office. Normally, names on the doors would be put on the out-side, so that passers-by would be able to read it. The name being applied in vinyl on the glass door is being put on, on the wrong side of the door.
Audio problem: In the scene at the alumni ball right after Sherman's father says "That's strike three," to his wife, she begins to walk off and he starts saying gibberish things, his head is turned so that you can see his beard. Neither his cheeks nor beard are moving, even though you can hear him making those gibberish noises.
Continuity mistake: In the first dinner scene when the young boy is coughing at the table his body is obviously moving alot because he's suppossed to be choking. Then when the scene begins to end, the camera shows him from the back and you can still HEAR him coughing, but he's sitting at the table calmly as if nothing is wrong.