Comment 1 for bug 209692

In the Ubuntu forums (http://ubuntuforums.org/showthread.php?t=739229) I received the solving line for this problem: move or remove the following file and let it regenerate on reboot and it should start working:

/etc/udev/rules.d/70-persistent-net.rules

But I guess this bug should still be fixed in order to prevent users to have to do this themselves whe upgrading.