On last Tuesday we released VirtueMart 1.0.13. Shortly after the release it occured to some people that the registration during checkout wouldn't work anymore - the site would just go blank. It seems as if some PHP installations act differently from the versions used for Testing. To resolve the bug, we have decided to issue a Patched Version of VirtueMart 1.0.13: VirtueMart 1.0.13a. That way you don't need to install 1.0.13 first and then apply a fix (like you must do with Joomla! 1.0.13 currently).
All Packages have been updated - including the Joomla! 1.0.13 eCommerce Edition. Please make sure you grab the latest version!