I apologize, I thought you were attempting to upgrade Ubuntu, that explains why /var/log/dist-upgrade is empty. I'll remove the incomplete status and let someone more knowledgeable about downgrading firefox help you out, as I've never attempted that myself. If you could please amend the bug description to be more specific about your problem that would be helpful to other triagers, though.
** Changed in: update-manager (Ubuntu) Status: Incomplete => New ** Tags removed: lucid2maverick -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/884553 Title: Could not calculate the upgrade To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/884553/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs