Saw this in the RAWMagic thread. Looks like it could be a solution, if it could be implemented in one of the raw converter tools
"I have a suggestion, which may or may not be a good idea!
It concerns a possible fix for putting the CDNG's through ACR, which sometimes causes exposure variances, even with using Process 2010 in ACR. It seems that ACR needs the lightest and darkest points in the frame to be constant, otherwise any highlight or shadow recovery causes the exposure shifts.
If RawMagic could add another 2 lines to the image, say a pure white one at the top and a pure black one at the bottom, this would fool ACR into treating the high and low point of all the frames as the same (because they would be the same!)"
"I have a suggestion, which may or may not be a good idea!
It concerns a possible fix for putting the CDNG's through ACR, which sometimes causes exposure variances, even with using Process 2010 in ACR. It seems that ACR needs the lightest and darkest points in the frame to be constant, otherwise any highlight or shadow recovery causes the exposure shifts.
If RawMagic could add another 2 lines to the image, say a pure white one at the top and a pure black one at the bottom, this would fool ACR into treating the high and low point of all the frames as the same (because they would be the same!)"