Installing ezdemo on a non virtual host setup will break navigation in some conditions
Steps to reproduce

1. Install ezpublish in a non-VH setup using setup wizard
2. In admin interface create a folder on homepage
3. Open frontend
4. Open Created folder

Full path like: http://ezp.docroot/ezpublish5/web/index.php/eng the link will work
Path like: http://ezp.docroot/ezpublish5/web/index.php the link will not work it becomes http://ezp.docroot/ezpublish5/web/index.phpFolder
Path like: http://ezp.docroot/ezpublish5/web/ the link will not work it becomes http://ezp.docroot/ezpublish5/webFolder