Rubricks - Rails-based CMS

Rubricks is a new Ruby on Rails based CMS. The demo looks pretty good. For bad luck it's crashing my Firefox browser everytime I tryed it :( Working with Safari.
The english site is still not fully functional (the registration at least working). If you decide to go with the japanese site, the registration is different for the both sites, so you cannot try both of them with one registration. Heavy Ajax usage - be sure your browser have JS enabled.