At first I thought it was me, but now I'm sure it's not. When using Brush Color Dynamics (any options) on a 16 bit image, the brush behaves very strange. I get a rainbow of colors (not related to the currently selected colors). Switch the image to 8 or 32 bit and the brush works fine. This is true of all brushes I've tried - built in and my own. This is with CS5 extended. Any ideas?