It's terrible, but as long as they leave the old themes in, I guess won't mind. It's the lack of a menu bar that bothers me the most; if they don't let me revert to that, I'll end up switching browsers. Mozilla's looking to make the classic mistake: don't change it if it works. For me, at least, Microsoft made the same mistake with Office 2007; they got rid of the menu bar and made it into some horrible, annoying mess. Mozilla's doing exactly the same thing. Instead of having a bunch of options readily available in one place, they're either spread all over the screen or put somewhere where you'd have no idea to look for them. This is bad design at its worst.