I had one of those little “Aha!” moments today. I was putting together an outline for a work project and next to it I had a Preview window with a long PDF document in it. I kept moving back and forth between the windows and activating the Preview window to scroll down the document then clicking back in OmniOutliner to resume work there. Well wouldn’t you know one time I forgot to click first in Preview AND IT DIDN’T MATTER. Yup. In Leopard you can mouse scroll (or two finger scroll on your laptop) and move through an inactive window. Try it yourself.