Comment 14 for bug 1069133

From ubuntu-meeting discussion about this bug.

08:34 < slangasek> do you recall if we had any idea at
                   the time what to do to improve this?
08:34 < xnox> slangasek: as far as I remember the
              solution was to either (a) ppa-purge X-swat
              ppa before upgrading & downgrade to release
              or (b) upgrade with X-swat ppa enabled,
              upgraded to next one
08:35 < slangasek> right
08:35 < xnox> slangasek: at the moment, we disable ppa
              and try upgrade.... which does not work. I
              wonder if we can do an upgrade calculation
              with downgrading $core packages to release
              first.
08:36 < xnox> or at least say you have packages from
              these PPAs installed, would you like to get
              rid of them first, before upgrading?