Upgrading to 4.7 on natty backports and experimental PPA I got this error, presumably from a previous experimental PPA upgrade. dpkg: error processing /var/cache/apt/archives/korganizer_4%3a4.7.0-0ubuntu1~natty1~ppa3_amd64.deb (--unpack): trying to overwrite '/usr/bin/kincidenceeditor', which is also in package kontact 4:4.5.95-0ubuntu1~ppa1 Jonathan