I can no longer go back to a previous page--the back arrow is greyed out and I can't use keyboard or mouse commands to do it. I no longer have history under my history menu (which I can live with), nor do I have any autocomplete when entering URLs (which is driving me crazy). The color scheme for lots of things has changed (which is annoying), and in particular, visited links are no longer visually distinguishable from unvisited links (which is far beyond annoying). I see bad behavior with large numbers of tabs open (but then, maybe that bad behavior is mine). And when I mouse over a link, my cursor no longer changes its appearance.