I can confirm,
same error after clean install of hardy-alpha3
the update-manager on the live cd told me:
update-manager:
Error communicating with the backend.
Please report this as a bug.
but running it anyways gave this:
not all updates can be installed
run a partian upgrade, to install as many updates as possible.
this can be caused by:
a previous upgrade which didn't complete
unofficial software packages not provided by Ubuntu
Norman changes of a pre-release version of Ubuntu
choosing partial upgrade gives:
Could not calculate the upgrade
A unresolvable problem occured while calculating the pugrade.
Please report htis bug against the 'update-manager' package
and include the files in /var/log/dist-upgrade/ in the bugreport.
the dir only contained apt.log (attached)
** Attachment added: "apt.log"
http://launchpadlibrarian.net/11333692/apt.log
--
[Hardy] update-manager could not calculate the upgrade in a partial update
https://bugs.launchpad.net/bugs/181762
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