In the morning after the attack on Lara's mansion when the delivery service guy comes in to deliver mail, he comes upon Lara's mansion doors open and then as he proceeds and the camera angle changes, it now appears that both doors are shut. (Note: This is because the exteriors were shot at a real mansion, but no permission was given to film inside.)
When Lara gets out of the pool after trying to save Alex from the knife wound she is dry. Her clothes may be damp, but no water is dripping from her body and her clothing should have been soaked.
During the final action scene Lara puts her guns on the ground. In the following sequence, when she is running from the room, she has her guns holstered at her hips yet she had no opportunity to pick them up.
When Alex is counting down to get the first half of the triangle, he reaches 28 seconds. Lara then interrupts and has a conversation that lasts over 28 seconds. When Alex resumes his countdown he begins at 12 seconds again.
When they're in the Cambodian ancient ruins, Lara places the clock mechanism in the eye of the statue. In one of the wide shots, however, the clock is missing.
It is stated at the start that there will be an alignment of all 9 planets, resulting in a full solar eclipse. The 9 planets never align completely, and never will due to the orientation and tilt of their orbits. The closest was all of them in the same part of the sky in 949AD, and will again happen on 6th May 2492.
When young Lara is watching the planets orbiting on the orrery, they are moving clockwise as seen from above. They should be moving anti-clockwise.
Lara's whole goal in the film is to destroy the triangle so the Illuminati can't use it's evil power, however, after successfully getting the first half at the first tomb, she spends the entire third act trying to acquire the second half in order to destroy them both. The problem is that she has one piece already and one half cannot work without joining it with the other, so why doesn't she just destroy the one she has, rendering the second piece useless?
When Laura is driving to meet with Manfred you hear the sound of the car's engine revving and shift gears but yet the brake lights are lit up and the car is coming to a stop. However this is a common technique when slowing in a car with a manual gearbox known as rev-match downshifting. The engine throttle is blipped whilst shifting down one or more gears while the car is slowing down.
Lara and her vehicle are parachuted into Cambodia. The parachute canopies are far too small to safely deliver that kind of mass.
When Powell pulls the knife out of his shoulder, the blade is obviously retractable.
During the attack on her mansion, Lara picks up a commando between her legs, and with the help of her bungee cord, throws him into two other commandos. When they fall, you can clearly see that the HK G36's they're carrying are rubber, because one of the barrels bends as it hits the ground and stays at an awkward angle.
Manfred Powell uses an Ericsson mobile phone without opening the "flip" mouthpiece. One cannot make/receive voice calls on that model unless the flip is opened.
Scene in Cambodian Temple: When a guardian statue throws a sword to kill Powell, he uses one of his bodyguards as a human shield, but the sword still should have killed him, based on the length of the sword and how deep it penetrates the bodyguard.
In the first tomb, there are piles and piles of lit candles, despite the tomb being sealed for thousands of years.
When Lara defeats Powell, she kills him by delivering a chop to his throat. Realistically speaking such a move would have crushed Powell's trachea and caused him to gasp for air until he suffocated. His death would have taken several minutes yet, he falls dead instantly as soon as Lara delivers the final blow.
There is no way that the pillar Lara rides to burst the glass urn in the first tomb would still be swinging hard/far enough for it to do any damage to the Vishnu statue that comes to life, also even if it was, the pillar cannot possibly be so light that someone of Angelina Jolie/Lara Croft's size could alter its path so dramatically.
The ringing of the bell breaks the ice wall, but not the icicles hanging on the bell itself.
All the characters in the Siberian model of the Solar System are using orange glow sticks, despite the entire cave being completely lit.
During the attack in Lara's mansion, when she jumps out of the corner near the roof to pick up a commando between her legs, the camera behind her shows two crew members over her left shoulder.
When Alex is climbing on the planet model, he has to duck down to avoid being hit by another planet. A crew member's hand can be seen helping to pull him down so he doesn't actually get hit.
In the "Dead Zone" where nothing electronic works (cars, computers, helicopters) Lara uses a laser sight to reactivate a time storm.
Lord Richard Croft states that the two halves of the triangle were taken from the city in the crater and hidden at opposite ends of the earth. Despite this the second half is found in the city itself in Siberia, and the first in Cambodia, on the same continent.
Both tombs contain an obvious error. The first is (judging by how far Lara falls) located deep underground, and the second is located in a cave in the Siberian mountains, however each is amazingly well lit, considering neither should have a source of sunlight.
Lara finds the clock at night. She then goes to Bryce's trailer, where it is pitch black, and mentions that it is five in the morning. One would assume that she immediately went to Bryce after finding the clock, however Lara then tells him that she "found it last night". So Lara waiting at least 5 hours before consulting with Bryce? Furthermore, there is light flooding through all of the mansion's windows during this scene. Lara then leaves to go to the auction house and it it clearly the middle of the day. How long did it take Lara to show Bryce the clock considering it was completely dark out when she woke him up to come look at it?
The model of the solar system is inside an ice cave in the freezing, snow covered Siberian mountains. However, there is a pool of un-frozen water at the models base.
The Buddhist abbot at the monastery in Cambodia extends the 'wai', a gesture of respect (both palm pressed together and held just below the chin in front of the chest), to Lara, which she returns. A Buddhist monk would never give that gesture to anyone, and certainly not to a female, nor as the initiating party. Also, while monks are greeted that way, they do not return the gesture.
The marker for Lord Croft gives the date of his disappearance in the American month/day/year designation. The British use the day/month/year designation.
Just before Lara enters the auction room, the auctioneer is telling everyone there is a clock "shown to my left". When the camera goes to the expanded shot of the room, we see the clock to the audience's, not the auctioneer's, left.
When in the first tomb, Powell and his men all leave and let Lara fight the Vishnu statue on her own. However, Lara has the piece of the Triangle that they want, so why wouldn't they help her?
Powell orders his men to fire on the leader of the Illuminati, and they shoot machine guns at him. This was a poor decision because he couldn't have been sure that any of the bullets wouldn't hit the triangle pieces. In fact, in a couple minutes, Lara destroys the Triangle by shooting it.