I am running Fedora 19. I tied to install Fedora 20 Alpha in Gnome Boxes. The installer made it past the splash screen and the I got a irrecoverable error. Then I tied to install Fedora 19 and got the same result.
PS: I should have been more specific. I used the same CD to install Fedora 19 on bare metal as I did in the box. I had no trouble installing on bare metal.