Re: MAC / CS3 / DVCPRO-HD color shifting, THE CHALLENGE!

I have had a similar problem with the Quad-Core Intel (2x3Ghz) and Apple ProRes files (originally shot on Red camera and exported via Red Cine). I've been working at a company that still has a bunch of PPC machines (how last century), and the gamma shift with the new machine(s) is huge.
From the Almost Silver Lining Department:
One way to test to see if you have this problem (even if you can't compare to other machines) is to import the movie file in question into AE, make a comp for it, open that comp and toggle different bits per channel (bpc) settings by option-clicking the bpc button at the bottom of the project window. When you shift from 8 bit to 16 bit, you should see a major gamma shift if you have this problem. If you do compare with another ('safe') machine, you'll see that the 8-bit is shifted considerably from one machine to the other (check specific pixel values). When you change to 16-bit on the 'bad' machine, the values will be much closer to 'correct' (16-bit) values, but still off. Of course I am assuming the 'safe' machines have the correct values (which I believe is a safe assumption).