New things I noticed after watching on TCM, then my bluray
If you watch the scene where Neville is in the command car, when he hits the pick up, you can actually see an explosion under the pickup helping force the command car over.
When the arrow strikes near Neville's head, you can see the string which guides the arrow to the wall. You can only see this on bluray, but the spot is visible before the arrow strikes.
There are plenty of bloopers in this short sequence, from studio lights in the background, to the cable under the truck to keep it from hitting the command car or moving further into the building sets, the car being struck with bullets and getting a flat tire to being inflated again with no bullet marks, and the bag of explosives being slid under the car twice.
In the final sequence with the kids, if you look in the girls sunglasses you can see at least 4 people on the crew and the set light.
SPOILER
One big difference between the TCM and bluray was the sound. Most noticeable was the impact of the spear into Neville's chest. There is absolutely no thus on the TCM, while the bluray sounds awesome.