After installing Debian stable no IPv4, but IPv6 is up

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http://serverfault.com – After installing Debian stable (squeeze) I found that eth0 is not coming up, when I bring it up with "ifconfig eth0 up" only IPv6 is configured. Installation did happen in a home network with IPv6 enabled through a tunnel and a radvd router. Which makes me think it may have decided to disable IPv4, don't know how or why. Modprobe does not show IPv4 is disabled. I have done many installations in an IPv6 enabled network like this one and Debian (or Ubuntu) would always be able to use IPv4, given all drivers and configurations are correct. The motherboard is a VIA e-900 mini-ITX. Ethernet is a (HowTos)