I just installed passenger 3.0.(on rvm system, using sudo).
Strangely, gem path was not found.
So I did "sudo /var/lib/gems/1.8/bin/passenger-install-apache2-module".
Installation process was smooth.
I modified httpd.conf and added myapp.local configuration and modified
hosts for the local domain.
I also reloaded apache2.
When I visit the site from my browser, it just shows blank page.
No error.