First of all, I would like to see a table of changes that have occurred with the DNG format.
Second, if I have DNG files from some time back converted with earlier versions (in particular whatever was within the earlier versions of LR) would it be worth my while to 'update' these to the new format? Can it be done without having to open the original .CR2 and .CRW files? Actually, can it be done at all?
Okay so that 2nd question was more like 3 questions in themselves.