@Jan: Here's the sample of the Leia scene encoded in UtVideo RGB - if you could find a way to encode a BD compliant video from it while keeping the colours the same, it would be awesome:
http://uloz.to/xiS22xh/leia-rgb-sample-avi
Otherwise, I think I could live with the more orangey reds, I actually think that the Han shot looks a little better that way.