PaulisDead2221: Obi-Wan's lightsaber has always been of a lightish cool blue color, with a natural flowing quality to it that looks great. Look at the picture of Obi-Wan by my name, that's the true appearance of his lightsaber. In the SE they changed it to give it a darker blue color and in the 2004 SE it looks more like that solid form you see in the prequels, giving it an artificial appearance. They did something similar to Vader's lightsaber in the SE. Also, if I recall correctly, the color isn't even as red as it should be in the 2004 DVD set, that's on top of the prequel-like changes they made to it.

zombie84 knows a good bit about this, perhaps he can describe it in more detail. But Lucas definitely messed with them in the 2004 even-more-SE set.

So hopefully this will be replaced with the correct footage from the GOUT in the Star Wars Vintage Edit, since this is a restoration of Star Wars from before the SE. :)