Just I very very minor suggestion - I had the same problem with DR before:
I saw that from my 3ds max asset tracking, some bitmaps had only a file name but not a folder where they are.
This made my DR-images become "striped", 30% darker etc.. After I fixed the paths: no problems.
I use Gamma 2.2on my workstation and in my farm computers there is just 3ds max & corona 1.2.1 installed, I havent started 3ds max there and I havent played with the gamma controls on them.
But is it possible that if my workstation sends a DR-file to the farm computers, could they somehow be rendering with Gamma 1? (When I had the stripe-problem I wrote about it and someone said to check the Gamma values...)