I tried to tweak the Adobe Standard Beta for Nikon Coolpix 8700 profile to match the look of TIFF output of the same image from Capture NX. Though I could manage to get a perfect match of the colors (by way of around ten points in the green to red range), When I looked at the file so rendered at 100% there were significant posterisation issues and abrupt tonal changes which were very difficult to eliminate. Any similar experiences and suggestions / comments.
I am using Win XP Pro SP2 on a Intel Core2 3GHz. and G33 motherboard with its onboard Graphics card.
In one of the other Adobe forums someone was complaining about this same problem. Eric asked the person to send him the profile. He indicated that the person had placed too many adjustment points in similar colors, and had adjusted them significantly in opposite directions. He indicated that when this happens posterization is inevitable. Apparently it's better to do more of a general profile, and then complete the fine adjustments within Camera Raw.
I'm not saying that this is the answer to your problem, but it might be something for you to evaluate with your profile.