"From our understanding of the issue, turning IPv6 off should alleviate the threat and make users fully anonymous again."

temporal fix

"sudo su -
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6"

http://tutorials-tips-tricks.info/disable-and-turn-off-ipv6-in-windows/

Perfect fix

http://mullvad.net/en/teredo_disable_win.php