>Dermot, sorry, my answer was for a different problem - I misunderstood what was wrong. I've seen several other people with the same preview problems under NT, but have NOT seen an answer.
Barbara and Dermot,
Just to add to the fray on this one, I am using NT exclusively and have never seen the problem. Although I'm not sure if I ever have seen a preview on a 14" monitor.
It sounds to me like this may be video driver problem.