Thanks for your bugreport.
Please try to remove the cdrom entry for the 8.04 version from your sources.list file (e.g. via software-properties-kde or software-properties-kde) and try the upgrade again
Thanks for your bugreport.
Please try to remove the cdrom entry for the 8.04 version from your sources.list file (e.g. via software- properties- kde or software- properties- kde) and try the upgrade again