I have this exact same bug at the moment. I did an aptitude upgrade on my system and now it is refusing to settup gconf2-common or any thing that depends on it :( showing the same error message as above. I have tried re-configuring a few packages but still the problem. I don't think a blanket reinstall is an elegant solution and will not help some people so I'll continue to try find the root cause.
-- Fails to install https://launchpad.net/bugs/43167 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs