OK, found a reason. adobe-flashplugin is not present in the partner archive for the amd64 architecture http://archive.canonical.com/dists/maverick/partner/binary-amd64/Packages however it is there for the i386 http://archive.canonical.com/dists/maverick/partner/binary-i386/Packages which means the "go to youtube, get bounced to adobe, use apturl" method of installing flash is broken on 64 bit, even if flash itself when installed via flashplugin-installer is actually fine.
OK, found a reason. adobe-flashplugin is not present in the partner archive for the amd64 architecture http:// archive. canonical. com/dists/ maverick/ partner/ binary- amd64/Packages archive. canonical. com/dists/ maverick/ partner/ binary- i386/Packages installer is actually fine.
however it is there for the i386 http://
which means the "go to youtube, get bounced to adobe, use apturl" method of installing flash is broken on 64 bit, even if flash itself when installed via flashplugin-