Comment 6 for bug 497299

Solved for me by changing a wrong file /etc/network/interfaces from
auto lo
iface lo inet loopback
 post-up iptables-restore < /etc/iptables.up.rules

to:

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
#iface eth0 inet dhcp

Btw. the file /etc/iptables.up.rules does not exist!
All with the same problem should replace /etc/network/interfaces, and confirm, if this solfes it.