Yes I did!
In netcardconfig, when I answer Yes to "Use DHCP broadcast?" I get those NETDEV WATCHDOG messages again, about 5 or 6 of then and finally an "operation failed" message.

Before the Netdevs I got an "Sending DHCP broadcast from device eth0eth0: Media Link On 10mbps half-duplex.

I'm conected to a 10mbps hub, but that is not the problem since I conect to the net using this under windows, isn't it?

Any other sugestions?