Working on making a DVD of the trilogy means you usually watch pieces of footage many times to make sure your cleanup filters aren't destroying the picture quality etc., this leads to seeing bits & pieces you never noticed before, so far I've noticed:

ANH: Stormtroopers - when they're running through the forest to get C-3PO & R2-D2 they're all looking down at the ground because the helmets have limited vision, you could out run them easily in a forest

ANH: Greedo - for a single frame, just before he's shot by Han, you see a really bad mock-up that's so obviously not got a person inside the suit
ANH: Luke's parents - holy crap I just noticed this for the first time after seeing the film so many times, when Luke gets back to his home after the empire have destroyed it, you see two smoking skeletons outside on the ground!

What things has anyone else noticed during watching the same piece/film after many time?