Okay, I'll try and explain my problem. Running Photoshop CC, Early 2008 Mac Pro 3,1 OS 10.9.1. Just installed new video card, Nvidia Quatro 4000. When I choose filters specifically Diffuse Glow and the image is brought up in the filters window, the tone values in the image are reversed. Whites are rendered as blacks or grays. I've noticed also in some of the other filters IE say Charcoal that when the filter is selected the image tone values are reversed??? I tried the same filter in CS4 and it worked as it should. CS5 & CC are corrupted somehow? Anyone have a similar situation?