Plot hole: The Toymaker throws that toy bird at the hippie version of himself. The toy goes through him because he is a hologram. Later, he pushes the soldier version of himself at the screen making it crack. How could he if the three others are holograms?
Plot hole: It's amazing that the two Chapman women weren't caught at "Rock for Daddy Day Care". One of them unzips a guy's dog costume in the middle of the path with everyone walking by. A little kid actually stares right at her when she does this. Also when Jenny puts the cockroaches in the salad, the people who were waiting in line for food would definitely have seen her. There are many more parts like this.
Suggested correction: And yet this kind of thing happens in real life too. Where somebody goes around causing a ruckus in a crowd, people around see them, but they say absolutely nothing and let them get away with it. It's called the "Bystander Effect," where people don't want trouble, so they assume somebody else around will do something. The encouragement of "See something, say something" comes from this exact thing. If it happens in real life, there's no reason it can't happen in the movie.
Plot hole: When 625 is activated, he has nothing with him, so how does he make all those sandwiches out of nothing?
Plot hole: When Erica crashes at the Huston Raceway Park a helicopter from the University of Utah lands to pick her up, it doesn't make much sense to fly a trauma patient over three states; At least not until she is immediately stabilized at a local hospital. We even see a truck from the Huston International Raceway drive up to the accident.
Plot hole: In the first Jungle Book movie, the role of the vultures is that they do not seem to be hesitant when helping the boy, Mowgli in need of help from Shere Khan. However, in this movie, when their obnoxious vulture friend is attacked by Shere Khan, they do absolutely nothing to help him and in fact, fly away cowardly. Did they suddenly lose all of their courage?
Plot hole: In the scene at the little girl's party where Cat is the pinata, and he gets whacked in the groin, he screams out loud, all the kids hear him, you even see their shocked faces as well. But after Conrad and Sally throw the lollies, the kids totally forget about Cat yelling - hardly likely given the level of shock. As well as that, wouldn't the kids have noticed that the Cat didn't have a hole in it when they saw the lollies? They just came from behind a bush. And to top it all off, in the scene where all the kids are greedily on the ground grabbing the lollies, and the Cat's about to hit the kid that whacked him, in the bottom left corner, a little girl looks directly at the Cat, Conrad and Sally.
Plot hole: Why did Inspector Gadget put his glove on his right hand? We see a toilet brush in place of his hand with a glove on it, yet when he's flying through the air doused in toilet water, he has his glove back on.
Plot hole: Throughout the film we see several characters talk about how there's no Christmas spirit and how nobody believes in Santa anymore. If, in this universe at least, Santa does exist, it's almost impossible for people to think this. If the parents deliver the presents then how do they explain the excess gifts that Santa brings? We know that Michael is on the nice list because Santa shows him towards the end, so Michael must get presents from Santa. There is no way that Walter can't believe in Santa then because Michael gets gifts from him every year.
Suggested correction: Emily and Walter probably just thought each present Michael got from Santa was from the other parent. I'm not sure if Walter got him presents or not but you can see that Emily did as she's seen walking home with presents when she's on the phone with Walter.
That is highly unlikely. When my daughter was "believing in Santa" age, my wife and I always talked about what we were getting her, so we didn't duplicate. Plus that theory wouldn't work for single parents.
It is very likely because it's obvious Walter is not in the Christmas spirit like his wife and Michael are. Plus it's obvious Walter is not focused on his family at the beginning of the movie so it's safe to assume the original submission is correct.