I posted this question a few days ago but got no response so I am posting it again.
I like using VueScan with my SS4000 scanner but I am consistently seeing highlight and shadow pixel clipping on my transparency scans. When I use Polaroid's Insight software for scanning, I get a nice histogram with no pixel clipping. I have tried Vuescan with 0% white point and 0% black point and still get the same clipping. I am using ordinary settings on the color tab: brightness 1.1, gamma 2.2, etc. Any reason this is happening? Stan