This is one of the most radical changes I've ever seen in a website- it seems like it would have made more sense to add it as a an option, and slowly make it the default.  At the very least, they should have had a ton of tooltips all over the site. "Remember X feature?  You can now do it here."  GrooveShark did a great job of having little helpful popup boxes when they redesigned.<p>I can't think of a single site I currently use that could pull off such a massive redesign.  It would be like Digg replacing the whole site with something from <a href="http://labs.digg.com/" rel="nofollow">http://labs.digg.com/</a>.  Pretty? Sure. Usable?  Not so much. Users don't necessarily dislike the new site, they're just confused.<p>And nobody likes to be confused.