My main issue was the needless animation in the background. Safari 5 on a fast Core 2 Duo is plenty usable with it, but when my scroll framerate seemingly goes

My main issue was the needless animation in the background. Safari 5 on a fast Core 2 Duo is plenty usable with it, but when my scroll framerate seemingly goes from 60fps to 30, it's not worth it. Smooth scrolling is just too high on my UX priorities list.