Deliberate mistake: In the chase through the tube station, Bond and Silva both slide down between the escalators. On the London Underground, this area has hard vertical signs at regular intervals, precisely to prevent people sliding down. (01:31:50)
Deliberate mistake: When Connors becomes a humongous Lizard, his robe magically grows from a Medium size to an XXL. (01:06:50 - 01:17:45)
Deliberate mistake: The Army Colonel's Class A uniform does not have a name plate on the flap of the right breast pocket as per regulations. If the Colonel's name plate was present, there would be no twist to the movie. (01:21:50)
Deliberate mistake: In the finale, the main characters exit 'the fall' and climb up the outside of the vehicle. As the vehicle is travelling at thousands of miles an hour, they would have surely been sucked off instantly and most certainly would not have been able to maintain a grip on the ladder rungs as they climbed 'the fall'.
Deliberate mistake: Empty magazines aren't that heavy, but when Alice kicks it into the face of one of the zombies, it looks like he's being hit with a baseball bat. (00:22:45)
Deliberate mistake: The bomb is placed on M.S. One and Snow and Emilie get in the space suits. A cut to the bomb shows 14 seconds. Then back to Snow and Emilie as they talk for a bit. About 14 to 15 seconds go by, and then it cuts back to the bomb, which now shows 10 seconds... It counts down to 8, and then cuts back to Snow and Emilie as they run and jump out of M.S. One. The shot lasts about 7 or 8 seconds, then cuts back to the bomb, which now shows 2 seconds. The timing between shots and syncing with the bomb is way off here. (01:20:20)