Page not found (404)

Request Method:	GET
Request URL:	http://www.smallworldexperience.com/images/sub-submenu-bottom.png

"/var/www/vhosts/smallworldexperience.com/httpdocs/images/sub-submenu-bottom.png" does not exist

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.