We just released an update that makes a couple of small improvements to the interface.
First, you'll notice that confirmation dialogs -- the windows you see when you take an action that's hard to undo -- are spiffier. Since we needed to create custom dialogs for the upcoming Steam client anyway, we decided to implement them for all clients. We hope they'll help keep you immersed in the game more than the browser defaults we used before.
Second, we've reorganized the navigation links in the header bar to make them a little easier to figure out, especially for new players. This is part of a broader set of tweaks we've been making to elements of the game that haven't received a lot of TLC recently.
As always, let us know if you see any issues. Thanks!