I'm seeing some typical jpeg noise in the blue channel, but no banding on either of my displays in any of the images. I also plotted a neutral response curve from your camera profile, and the profile appears to be smooth, with no discontinuities to speak of.
I suggest the next step would be to check for visible banding in an artifically created gradient. If you see banding in this situation, you are encountering a display profile or LUT problem, and not one with your camera profile.
Mike Russell - www.curvemeister.com
