Relevant Repost: [FAQ] New Layout
I know reposts are generally frowned upon. However, I think that the need is pressing for this one, so I'm doing it:
There is a new layout for Duolingo. Now, all users have been switched to this layout. Many things have changed in this, so please read this FAQ if you have questions:
Thanks, and please upvote this if you liked it: if it's at the top of the page, users will see the answers before they have to ask questions!
Also see: http://www.duolingo.com/comment/1546916