Harmy said:
Have you read my previous post?
Actually, you posted that while I was typing mine. :)
Anyway, for a lossless codec you could try Huffyuv, it's the one me and DJ are using.
And even if any render would change colors when encoding it to blu-ray later, you could always offset it with a script.
I think it's worth solving, since even though the orangey reds make some scenes look slightly more natural, it's just too visible in the strongest reds that they're off. (At least to me, on a calibrated monitor)
There's also a small thing I noticed in the WP when checking that scene with Leia and R2. When this shot starts, the picture has a cooler tint and suddenly it turns warmer:
