I have noticed a considerable error in A New Hope. It concerns the color of Darth Vader's lightsaber. After he kills Kenobi, Luke yells and then Han Solo tells Luke to blast the door. Right after he does, we see Darth Vader walking towards that door with a BLUE lightsaber. It sure isn't red!! Surely he did not pick up Kenobi's lightsaber and ignite it?? That would be stupid. Has anyone else noticed this???? It is on my VHS tapes (not the special editioins).