I have upgraded and yes I have had, and still have problems with ACR, Photoshop, LR and ViewNXi after spending considerable time attempting to resolve. The problem I have is in the area of colour management. I did not have the same problem with running Win10.

PROBLEM -

When I open an image in ACR (raw or jpg) the colour is correct to my eye, whites are white and greys are grey. My monitor is calibrated. I can use the few different monitor profiles, latest and previous, that I have and whilst there are very minor differences whites are still white.

When I open that same image in PS whites are no longer white and the image has a yellowish hue.

At this point let me emphasize that my concerns/problem is not one of colour 'accuracy' but of colour 'difference' between what I see in the two different applications, ACR/PS.

When I save the image I am viewing in PS that has the yellow hue the resulting image is then as I viewed it in ACR, correct as far as I'm concerned.

In ViewNX that same image has a yellow hue. In LR develop mode the image is correct but the thumbnail to the left has the yellow hue.

INVESTIGATION -

There are references to this same problem on a couple of other forums I've found, along with references that Win 11 has not yet been fully tested in the colour management area. I have checked and rechecked absolutely every colour management setting but I can not solve it.

At present my workflow is that I only trust and use the 'colour' I view in ACR but I know that whatever I see in PS although the colour is wrong, will save correctly.

It's unclear if this is a Win 11 colour management or possibly a Graphics card compatability glitch.

P.S. Every other aspect of the update to Win 11 went faultlessly.