Maybe this is old news to everyone else, but I recently discovered that V4 RGB printer profiles (i1Profiler on OSX 10.8.5) can cause some very weird behavior and screwy color transformations in ColorThink Pro. For example, converting ProPhoto RGB to my printer profile with Relative Colorimetric turned bright red to green! It took me a few days to figure out what was happening, but going from v4 to V2 profiles solved the issue completely.
That made me wonder whether v4 RGB printer profiles are worth using at all. ColorThink sometimes chokes on them, and probably other applications as well. i1Profiler defaults to v4 profiles, so all the custom RGB inkjet profiles I have built with it are currently v4.
What, if any, advantages do v4 profiles provide? If the answer is 'none', or they are 'indistinguishable', then I will probably regenerate v2 profiles and send the v4 profiles to bit-heaven.
I'd appreciate hearing feedback and experience on the subject.
Thanks,
Lou