adywan said:

Well just watched ESB. No changes that i could spot other than the Wampa arm. Same old crappy 2004 colouring with the blown out detail in the bright areas in Cloud city. They haven't touched one lightsabre by the looks of things although i would have to run it side by side with the 2004 version to confirm it, but i'm 99% sure that this is the case. Same dull cores and pink lightsabres. The audio is the same as 2004. the lightsabre sound is still there as Luke exits the cave, yet the lightsabre is still activated.

So far it seems that there has been a lot of Bullshit coming from Lucasfilm about the work done on these blu-rays

I'm going to leave Jedi until later on. need some sleep now as it's 5:20am here now. This is the film i am most dreading watching after the few changes noted so far.

I watched the ESB 720p CHD release on my netbook during night and have to agree on the general colors. Identical to 2004.

But in some scenes the lightsabers look liked worked on - but in a bad way. All promotional material - think of purple lightsaber from Vader at 'there is no escape' - is exactly like that on those blu rays. Lightsabers felt different than in 2004, but even worse!
On the outside from pink, rose, light purple, dark purple, light red, dark red, light blue, dark blue.
The saber core from white to rose, pink, red, light blue, dark blue
Size: changing from scene to scene between thin and thick.
It's awful to watch, instead of paying attention to the story I was distracted and started to laugh on the PQ.

Edit: removed some link.