I am writing here to get some info out to, and response from, other architectural/landscape photographers working with Phase one backs.
When I switched back to Phase One, after two years with Leaf, I had gotten used to the notion that the color casts associated with shooting a MFDB on a technical camera could be written out of a RAW file and the new file could then be processed through the processor of your choice.... forever. This is true of both Leaf and Sinar.
In Capture One the color cast correction is written as a processing instruction that is only applied to the output, not to the RAW file.
When I switched back to Phase this was a big concern for me. If Phase One ever went under (in the next 40 years) I would simply loose the ability to process any of the RAW files I had shot with their digital backs. The solution I was told in November of 2006 was to output a DNG file from the Phase One software in the upcoming Capture One 4.0. A month later, 4.0 came out and I then had the ability to output LCC corrected DNG files, free of color casts, that could be processed in any RAW converter. Additionally, the files were much more archival, and so I began converting any long term projects to DNG (projects I might work on for 5-10 years or more).
Somewhere in the past 6 months or so Phase One re-wrote their processing pipeline and removed the LCC correction from the DNG files. The way I like to think of this is that I now have several thousand proprietary Phase One negatives that can only be printed in a Phase One enlarger. Not exactly what I signed up for. If Phase One goes out of business I'm out of luck. There is currently no plan at Phase One to fix this. I don't think it's even on the bottom of the priority list.
If this is important to you, then please contact your dealer to let them know. Also create a support case titled "feature request" on the Phase One site. In part, Phase One prioritizes issues like this based on the sheer numbers of customer requests. I post this here because I would guess most people are not thinking about the viability of their long term archive every time they hit that LCC button. You should know you have bought into a proprietary system that may not be around years from now.