And while it's at it, it obeys the color profile and gets eveything within gamut. So it has a "lossy" algorithm that does the translation. How much black ink to use as opposed to mixing CMY to make black is a decision PS makes. Why? The translation into CMYK is not fully determined. Once it's been through CMYK and back to RGB, it will all be within gamut and will look the same on the web as in PS. The quick fix for this problem is to move the image in and out of the CMYK color space. I turned on View->Gamut Warning, and sure enough almost all the shot was grayed out, meaning out of gamut. Looked pretty nice to me when I got done, but once I uploaded, it looked terrible. Today I editted a shot of Ginger's tombstone and flowers. It's very easy to make such colors with ACR and especially LAB curves. That means that it has some colors that can't be reproduced perfectly within it's color profile. Often the problem is that the image is out of gamut. Then I save it out, upload to SM and it looks terrible, not at all the same as in PS. I do some edit and get something that looks pretty good in PS. Here's a bad thing that happens to me once in a while.
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