Although this does not specifically answer your question, I normally mount negatives in slide holders which I find keep the film flatter. It of course depends on whether you wish to cut your negative strips.
Simon Marc S. Fogel wrote: > I use a Nikon Coolscan IV. When I scan color negatives with Vuescan(7.2.4) > the frame does not line up. I will get part of two frames in the preview as > well as in the scan. I do not have this problem with Nikon Scan 3.1. > Is there some way to adjust this in Vuescan to prevent this? >