We've just made a few further upgrades to the website to line up with further integration we're working on behind the scenes. I've also redone the themes so they should flow nicely with the new site.
Unfortunately I've had to reset everyone's theme setting. You can change your theme at the bottom the website (click theme).
Please note, 'Alt' is no longer under development and will be removed within the coming days (after further upgrades are done). If you are after the Alternate theme, please use 'Alternate - Fluid/Fixed'