It appears that due to the fact that Zorin is modified from the original Ubuntu ISO, I'm not supposed to update using any official ubuntu updates (11.10, 12.04) that pop up in update manager, since it will cause problems.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/990295 Title: Update Manager installing next os version (11.10) error To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/990295/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs