Occasionally, when using Selective Color Layer, the "Colors" dropdown menu that adjusts individual colors is grayed out and not available. A couple of times using the Hue/Saturation Layer the same thing would happen with the "Presets" dropdown menu. I have had to resort to closing PS and starting again. Only happens with PSCS6 and not PSCS5. win 7
I have the same problem with using the crop tool makes the selective color gray out to the last color adjusted. Using the perspective tool and selecting the entire image and making a crop(which doesn't actually make any crop) is the only way to fix the issue for me other than restarting the program. I'm not using any plugins.