Do you mean the site you linked to, or the beta site they're advertising at the top? Which seems to have problems, because nothing changes when I click-- except that the page refreshes. Yup, tried three browsers.
... and then if you continue deeper (I usually proceed directly to the manual) it would appear that I am in the new version, because now there's a "revert to the old version" option. Text is bigger, and there's a floating back-to-top arrow.
Ahem. Cough-cough. C'mon, php guys, we answer questions like this all the time!