[arch-general] Installing in VirtualBox - Screen goes black during installation

I started installing Arch in VirtualBox this morning but twice now the screen goes black at some point during (or right after) the package download step and never comes back. It appears that some activity is still happening, but nothing is displayed. If I do a full reboot the screen comes back but the install of course hasn't completed so I have to start over. Do I need to change some Display Settings in VirtualBox or something? I did tell it that the OS Type was Arch 64 bit. Thanks, -- Joshua Poehls