I am using Adobe Photoshop CS3 with ACR 4.2 and Nikon NX version 1.2. I have used Photoshop for years, and only started using Nikon NX about 2 weeks ago - have a D200 and software is on a PC.
It appears that white balance inputs for ACR (temperature & tint) are independent of white balance that was set in the camera, but Nikon Nx is not. If I have an image of a gray card in the same lighting conditions as the image I want to correct it does not matter that the in camera white balance was set to different values for the gray card and image if using ACR, but with NX it appears they both have to be set to the same white balance value. Am I wrong here?
It appears that when you input new values for white balance in ACR it calculates new values from the RAW file, but NX appears to modify an image that was calculated using the in camera white balance settings.
This means you could not set camera white balance to Auto and take a picture of a gray card to correct images that are not acceptable if using NX, but you could with ACR.