Disregard. Caused by medibuntu.org (no DNS record), due to no longer being maintained.
See: https://launchpad.net/medibuntu/+announcement/11219 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/574886 Title: Apt has strange network errors when updating indexes. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apt/+bug/574886/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
