WordPress 3.5 is officially available to everyone and brings lots of improvements to the WordPress core and to the user experience.
However, if you are using our WordPress Hosting Themes and our plugin – don’t update yet. We have discovered several incompatibility issues between the plugin and the new WordPress release, including problems with the order form.
We are already working on fixing these issues, and an update will be available soon. For those who already upgraded, the solution is to revert to the previous WordPress version. A collection of older WordPress versions is available here: http://wordpress.org/download/release-archive/.
Let us know if you are experiencing more issues with WordPress 3.5 and our themes and plugin.