The two machines I've upgraded from precise to quantal (yesterday & today) have both experienced this bug, resulting in the release-upgrader being killed, and requiring manual editing of files within /var/lib/dpkg/ and use of aptitude to complete the upgrade.
The two machines I've upgraded from precise to quantal (yesterday & today) have both experienced this bug, resulting in the release-upgrader being killed, and requiring manual editing of files within /var/lib/dpkg/ and use of aptitude to complete the upgrade.