Bootstrap 3 preview 
Not sure if I like this at all. I think they need to call it<p>Bootstrap 3: flat and fat!<p>It just seems like a huge step back to me. It's not even an elegant "flat" design; it's like they scrapped everything and decided to make all classes (even buttons for God's sake) DIVs of different colors. The new navbar, for example, is literally a gray DIV with rounded edges. I use Bootstrap on my web app because I care about design, but I don't care so much about learning fancy CSS; Bootstrap takes care of making things look subtly 3D, shaded, animated, etc., and that's what I'm looking for. I can make flat DIVs myself, thank you very much.