Marking as Fix Released due to the reports above and because there's been major work on IPv6 in Natty and even more on Oneiric (the current development release as of this writing).
** Changed in: network-manager (Ubuntu) Status: Incomplete => Fix Released -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/284874 Title: IPv6=automatic breaks IPv4 Status in “network-manager” package in Ubuntu: Fix Released Bug description: Binary package hint: network-manager after switching networks, or suspend ipv6 addresses are no longer discovered properly. sometime the default route is gone and never gets added again. sometimes the ipv6 address is no longer assigned. this is on a network with radvd running on the router. Changing IPv6=ignore allows IPv4 to continue network-manager: Installed: 0.7~~svn20081015t024626-0ubuntu1 Candidate: 0.7~~svn20081015t024626-0ubuntu1 Version table: *** 0.7~~svn20081015t024626-0ubuntu1 0 500 http://archive.ubuntu.com intrepid/main Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/284874/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp