I've noticed this ever since I upgraded to LR4. When I import a photograph and then click to view it, the large image shows for about 2 seconds while the file is being accessed (presumably). Then once it's fully loaded, the color shifts... usually more muted than what the preview had shown. Why the color change?
I hadn't modified anything at all yet... is it LR's interpretation of the camera profile? I shoot raw, but my picture styles is set to Portrait. Is the preview image being generated with the picture style and then everything reverts once the raw file is loaded?

