Plot hole: Henry gave Principal Wilder reasons he believed Christina was being abused: "Bruises, exhaustion, decreasing school performance." When Susan confronted Glenn near the treehouse, she said, "I know what you've done. Emergency room visits, school absences, bruises..." Neither had any concrete evidence/proof. Emergency room visits should have resulted in detection or suspicion of abuse if that's what doctors or nurses believed, and they are among the mandatory reporters. Maybe Henry was wrong. (00:20:35 - 01:30:30)
Plot hole: There's no way that plane could have crashed and stayed intact like it did.
Plot hole: This movie introduces, rather casually, nightshade as a vampire vulnerability. It works practically as in the videogame Skyrim, so whoever wrote it in the script most definitely played it. The problem of course is that a toxin that can murder most vampires and indefinitely paralyze the strongest elders, is a world-breaking concept that would have ended the war hundreds of years earlier, and instead is never used before or since the small scene it's instrumental to. Foreign translations which identify the nightshade with the more specific Belladonna plant (one of the most commonly used herbs since the ancient times) further aggravate the problem.
Plot hole: When The Ray is injured on Earth X and has Red Tornado's cortex, he escapes by Vibe sending him into a portal to safety. However it is evident that Vibe doesn't know where he sent The Ray or where he would be going as later he's trying hard, searching the multiverse for him. Yet somehow The Ray is able to go across universes and winds up coming out right at Earth 1's Ray's feet to transfer his powers over to Ray and give him the Cortex. This makes no sense. The Ray can't control Vibe's powers or where he sends him, so he would have had no way of making himself exit the portal in Ray's back yard. And if Vibe sent him there on purpose, he wouldn't have been struggling to figure out where he went. The only way it makes sense at all is for it to be the most massive co-incidence possibly imaginable where he accidentally was sent to another universe and happen to come out right at the feet of that universe' version of himself. None of it adds up. (00:09:50 - 00:16:50)
Plot hole: Donnie Yen rides away on the bike while XXX is still fighting baddies on foot, and when he grabs a bike he fights some more off with one wheeled acrobatics. So Donnie should have a huge head start, and inside the jungle of the hideout he knows and Xander does not. Still, with no explanation a couple scenes later they are side-to-side, Xander just happens to have miraculously caught up with him. (00:55:30)
Plot hole: When Doc outlines the plan to rob the Perimeter Trust bank in Dunwoody, he says it's "right next to the Buford Highway" which allows for a quick getaway. In reality, Buford Highway is multiple miles away from Dunwoody, with the section of the road the truck chase quickly transitions to being nearly 7 miles away. Similarly, this segment then quickly transitions to the John Lewis Freedom Parkway just east of Interstate 75/85, which is another 4 miles away.
Plot hole: When the kids barricade themselves in the basement, Brent and Kendall try to cut through the door, but Josh fends them off with a pistol he stole from his dad. After that scene, though, the pistol completely disappears from the plot; Brent and Kendall don't consider it when they try to gas the children out, and neither kid appears to have it after they escape into the house.
Plot hole: Derek, who escaped the mental hospital by pretending to be his twin brother Tyler, was able to locate Tyler's vehicle by using the keys to beep its horn. Once inside the SUV, he apparently found Tyler's cell phone, which is odd because most people carry their cell phones with them. But Derek did not ask Tyler for his cell phone's password before rendering him unconscious - so how did he gain access to the cell phone without the password? (It isn't likely that Tyler previously gave it to him). (00:20:40)
Suggested correction: Tyler never left his cell phone in the car. He had with him when visiting Derek. We see him pull out his cell phone to show Derek a picture, so the phone was already unlocked, assuming he locks it with a password in the first place.
I haven't had time to finish posting the rest of the mistakes I have, but I just uploaded two that should show up under "pending submissions." They probably should have been posted before the one above. I suppose the real question is where the cell phone came from each time.
Plot hole: Once Ben Kingsley has decided that the assault on the mall will happen, the good guys are given an insane amount of time to talk to the kid and calm her, have a nice conversation about what is happening, hole her up in a safe position, observe the vanguard of the baddies scout the parking lot and just then do all sort of A-Team style preparations, barricading the front door and booby-trapping the entrance. The villain is in a rush, knows the layout of the mall and does not fear the unarmed mall cops; there's no way they had time to do all that. Especially since his plan consists exactly of the brute force assault ("driving through" the front doors) that a little earlier Eddie mentioned, contradicting the stated purpose of not drawing attention from passing patrols.