The R1 DVD contains several deleted scenes, including Kosa's introduction, and an alternate ending in which Reiss kills Terry, instead of Lara doing the deed.
When they put their Wing-suits on, the arms and legs are not webbed. When they run and jump off the building they are not webbed, but when they start to glide they are. Also when they start to walk to the boat after they have landed, no webbing is visible between their legs.
Lara and Terry appear to be sliding down the rope, when in fact they are being lowered down. The ropes do not move. There is a second pair of ropes anchored to the ground, but they are not moving either, as they are anchored to a couple of boxes.
After Lara is hit by Terry in the Cradle of Life cavern, she wipes blood onto her lip, but in the next shot it isn't there. We see her the whole time and she doesn't wipe it off.