Think the design itself is quite good. Like you said, "bit rough around the edges" for example clicking a new tab should not center the tab on the screen. Your

Think the design itself is quite good. Like you said, "bit rough around the edges" for example clicking a new tab should not center the tab on the screen. Your using vertical-align: top; but it still is centered. Maybe its just Firefox 3?? Also its very responsive which is good.