Revealing mistake: When Bond is chasing the terrorist through the construction site, a large pile of black pipes fall from the building. While they are falling and as they hit the ground they make all kinds of metallic clanging sounds, but when they hit the ground, you can see that they are really plastic PVC pipes, as several of the pipe ends break off and small pieces fly off them.
Revealing mistake: When Bond is running up the crane to catch up with the bomb maker at the construction site there is traction tape, to help Daniel Craig keep his footing on the smooth metal surface, visible on the crane. It wasn't put there as though for the construction crew's use because it is only placed on the part of the crane that we actually see Bond running on.Phixius
Revealing mistake: Bond has just stormed the embassy and taken the bomb maker as a hostage. As they walk down a hallway, the bomb maker is shot in the leg. The squib that is planted under his trouser leg is outlined.