Harmy, just had a fiddle with the contrast & brightness of the SW BD, it looks like the blacks aren't as crushed as the HD broadcasts.....dunno what do you think...top left is the untouched video, right is the GOUT, bottom is the adjusted footage.......no audio on clip...think thats what youtube picks up on.

http://www.youtube.com/watch?v=3Z8QSA2Pi7w

Also has anyone noticed that when the scene switches back to the second shot of the Power-Droid (when it starts walking) it looks like the image switches to SD ( bit like the shot Ady noticed in ROTJ)