what i have done:
/etc/modprobe.d/blacklist.conf
blacklist net-pf-10
blacklist ipv6
/boot/grub/menu.lst
title Ubuntu 9.04, kernel 2.6.28-15-server
kernel /boot/vmlinuz-2.6.28-15-server ... ro quiet splash ipv6.disable=1
initrd /boot/initrd.img-2.6.28-15-server
quiet
But still:
root@bubi:~# ip a | grep inet6
inet6 ::1/128 scope host
inet6 fe80::a00:27ff:fecf:c12e/64 scope link
root@bubi:~#
Any idea?