Natalie is thrown into one of the skylights on top of the Los Angeles Theater and breaks two of the panels. When she gets up, the skylight is not broken.
As the Angels walk across the grass at the observatory, the sprinklers turn on and they're obviously getting wet. But, in the close-up after the car explodes, they're all dry and the sprinklers have switched off again.
At the beach, Natalie is chatting with the surfer while Alex and Dylan are under the car collecting his items. The camera cuts to the girls under the car and you can see the surfers legs in the towel, yet he is supposedly in the car already about to drive off.
In the bike sequence, the sky is mainly clear of clouds, but one shot from below a jumping bike shows a sky fully covered with high clouds.
When Ray Carter is driving his car and talking to Madison on the phone, the seatbelt is alternately over his shoulder / behind his back.
Dylan Sanders refers to her and Seamus O'Grady listening to heavy metal which gets depicted as a flashback. However, they are actually listening to Bon Jovi's "Livin' On A Prayer" which is a hard rock song.
When the Angels are dressed as nuns they are all wearing lipstick. Nuns do not wear lipstick ever.
The Thin Man seemed to have been killed in Charlie's Angels (2000), but is back alive. McG has explained that this seemingly superhuman quality is the tongue-in-cheek mystique of this illogical, larger-than-life character.
In the O'Grady warehouse the Angels find a metal tray full of rings and want to identify the titanium rings that are intermingled with the rest.
To do that, they fill the tray with champagne, lecturing: "If an object has a lower density than the liquid in which it is immersed, it will float." Pure titanium has a density of roughly 4.50 grams per cubic centimeter. Champagne is a mixture mainly of water (0.99975 grams per cubic centimeter), alcohol (0.79 grams per cubic centimeter), carbon dioxide (the 'bubbles', 0.198 grams per cubic centimeter) and some sugar. Champagne has thus a much, much lower density than titanium. They would therefore never be able to float to the champagne's surface as they do in the movie.
When Natalie is hiding like Spider-Man in the men's restroom, black tape to help avoid slipping is briefly visible.
When they are fighting Seamus after getting the rings back, you can see the wire from where the girls jump in the air are in a couple of shots.
At the observatory, when the car explodes, you can clearly see the reflection of the exploding car in the wet sidewalk, but no reflection of the 3 girls being blown backward.
In the first scene with the Mongols, when the crowd splits to reveal the big guy with the two machine guns, the gun in his left hand is a German made MG42 / MG3. in the closeup before he starts shooting, it is clearly visible, that the barrel is removed from the gun.
The Sony TV that Alex carries into Natalie and Pete's house is an obvious hollow plastic model; there's a hole in the speaker near her right hand that shows it's hollow on the inside. Also, the remote control on top of it seems to be glued on top of the model. The way the model is being carried, it should fall off.
When the Thin Man rips out a lock of Dylan's hair at the motorbike race she screams in pain, which makes no sense as she's wearing a wig.
When Alex is in the chess match and replying to the little boy's silent plea, her teeth can be heard clicking together when she opens her mouth, instead of when she closes it.
The wires attached to Madison are visible in the final combat sequence in the theater.
When Bosley is in the middle of the road as a crossing guard, just after Carter stops, you can see the reflection of a crew member moving in the hood ornament on the car.
The school crosswalk faces a cliff: the kids have, literally, nowhere to go after Bosely crosses them.
During Madison Lee's verbal confrontation with Charlie's speaker box, the shadow of the mike falls on the desk.
Dylan referred to a pair of 1991 Nike Air Jordans as being 1989 model.
Seamus O'Grady states that he has been in jail for 2920 days=8 years. With leap years, 8 years have either 2921 or 2922 days.