Ive not had a problem using the smooth preview, and tbh ive used it quite a bit on my main model as a quick preview for hard edges (and I've never used it on a duplicate as ive not noticed it making any changed to the underlying mesh it if go to it then back).
What does your non smoothed mesh look like as it's usualy down to the underlying mesh when theres problems.
"No pressure, no diamonds" Thomas Carlyle
Last edited by gster123; 07-02-2008 at 07:51 AM.