Today I was doing some 32bit skybox/HDRI stuffs, and I noticed that when I went to preview the histogram for the image's value range within Photoshop CS6, the histogram pane was completely grayed out. Is there a specific set of steps needed to get this to show up when working with 32bit documents? Or is this just a feature that isn't supported in CS6? Pretty sure I have been able to do achieve this in CS5, been a while though.
(Yes, I googled this question quite a bit and searched the forums, something I can't get any information for specifically.)