In my Win7 Photoshop CS6, if I softproof a document to its own colorspace, I see a change in colors. I think that should not happen.
If I softproof an Adobe98 document into the Adobe98 colorspace, the change is significant. If I softproof sRGB to sRGB, the change is less significant, but still visible. If I softproof ProPhoto to ProPhoto, the change is even less significant, but still there.
If I softproof a document from any colorspace to a different colorspace (Abobe98 to ProPhoto or sRGB) there is no change. Strangely, if I also turn on the gamut warning when a document is softproofed to itself, the colors return to normal. No change (and no gray gamut warning areas).
I've tested the same scenario on CS5 and it does NOT happen. Only on CS6. I'm confident that the images I used to test fit well within the smallest sRGB colorspace.
So, would someone else please test this on their CS6 to see if it happens to them too. If it does not, then I know I've got a problem within my system. Assuming that is the case, any hints on where to look?
I know it does not make any sense to softproof an image to itself, and I discovered this by accident. But it's giving me reason wonder if all my colorspace management is out of whack.