You cannot upgrade because of the unsupported PPA's you have on the system.
They are whats causing the upgrade to fail. You need to use a tool such as
'ppa-purge' to remove all the unofficial PPA's from the system, then try the
upgrade again.
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Ubuntu Bug Squad volunteer triager
http://wiki.
** Attachment added: "/var/log/dist-upgrade"
https://bugs.launchpad.net/bugs/789631/+attachment/2146064/+files/dist-upgrade_20110527-1446.tgz
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https://bugs.launchpad.net/bugs/789631
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