This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
The new look is enabled only for a certain set of pages which includes the thread view (the one which you see while reading a specific topic) and some others listed here http://www.coderanch.com/t/626268/Ranch-Office/Happy-Jumpin-JForum-Day-read. Forum listing page (the screenshots of which you posted) is not one of them, so it will look the same in normal as well as beta view.