Harmy said:

Finally, a clear and indisputable proof that the 2004 masters are being used for the Blu-Ray.

Now, the quality of the video that Ady posted isn't very good, so you can't judge from the colours or crushed blacks and other indicators of the 2004 transfer. At best, you can make an educated guess based on stuff like the blue haze around the explosion, like Ady did. But if you know the facts around SW transfers well enough, the definite proof is there.

A little story first: Not so long ago, an encoding error in my Despecialized Edition was pointed out to me, so I went and checked if it's also in the source file I used (a 720p encode of a German HDTV broadcast capture) and it was. So I went on and checked Adywan's AVCHD and it was there too. But both Adywan and I were using the German HDTV broadcasts for our edits, so I assumed the error must have been in the German broadcast capture but just to be sure, I went, dug up a DVD9 on which I had a UK HDTV broadcast capture burned and checked it there and it was there too. Suspicious, huh?

So I went to the OFFICIAL 2004 DVD and checked there and couldn't believe my eyes!!!

Here's the frame from the !!!OFFICIAL!!! retail 2004 DVD (check out the bottom of the frame):

So, it is quite clear, that this error is a part of the 2004 master, as it seems to appear in it's every incarnation, including the official DVD releases...

... and now, that very same frame from the Blu-Ray preview video:

It's relatively hard to make out due to the bad quality but when you know what you're looking for, it's quite clearly there.

Even though they have used the 2004 master there maybe evidence that they have altered/enhanced the colour pallete.

Even on the low resolution youtube clip the blu ray version looks more vibrant than either the 2004 DVD or the GOUT.