request path is not correctly determined when FLOW3 isn't installed in webroot
When FLOW3 is not installed in the htdocs root, it does not correctly determine the request path of the URI.
Instead of displaying the default view, FLOW3 tries to find the "Public"-Controller in the "flow3"-Package and throws a 404.
A temporary solution is to create a virtual host, so you can access FLOW3's root via
http://flow3/ (or the like)