When accessing my project I get to see this Constant U_DOMAIN already defined in /var/www/useridea.com/rc/www/includes/classes/Ctrl/Main/Ctrl_Projects.php on line 108 Clicking on any of the ideas for my project doesn't show me the idea.
OpenID is service that allows you to log-on to many different websites using a single indentity. Find out more about OpenID and how to get an OpenID enabled account.