Hi,
This has now become a strange mystery. I am looking at the same image.
DNG file viewed in Google Picasa - I see the purple and white patches.
DNG File viewed in FastStone Viewer when I press - A. No patches.
I think there is an embedded jpg in the DNG and does get damaged. I did not even transfer the file into the computer and this is a formatted SD Card.
We need to understand how these DNGs are being handled by the computer or the software editing programs. For now the first thing I am doing is switching to PEF.
Something is fishy!
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