Preparing to replace computer-janitor 2.1.0-0ubuntu1 (using .../computer-janitor_2.1.0-0ubuntu2_all.deb) ...
Unpacking replacement computer-janitor ...
Preparing to replace libmagickcore3 7:6.6.2.6-1ubuntu2 (using .../libmagickcore3_7%3a6.6.2.6-1ubuntu3_i386.deb) ...
Unpacking replacement libmagickcore3 ...
Preparing to replace libmagickwand3 7:6.6.2.6-1ubuntu2 (using .../libmagickwand3_7%3a6.6.2.6-1ubuntu3_i386.deb) ...
Unpacking replacement libmagickwand3 ...
Preparing to replace imagemagick 7:6.6.2.6-1ubuntu2 (using .../imagemagick_7%3a6.6.2.6-1ubuntu3_i386.deb) ...
Unpacking replacement imagemagick ...
Preparing to replace imagemagick-doc 7:6.6.2.6-1ubuntu2 (using .../imagemagick-doc_7%3a6.6.2.6-1ubuntu3_all.deb) ...
Unpacking replacement imagemagick-doc ...
Preparing to replace libmagick++3 7:6.6.2.6-1ubuntu2 (using .../libmagick++3_7%3a6.6.2.6-1ubuntu3_i386.deb) ...
Unpacking replacement libmagick++3 ...
Preparing to replace libmagickcore3-extra 7:6.6.2.6-1ubuntu2 (using .../libmagickcore3-extra_7%3a6.6.2.6-1ubuntu3_i386.deb) ...
Unpacking replacement libmagickcore3-extra ...
Preparing to replace kubuntu-firefox-installer 10.10ubuntu4 (using .../kubuntu-firefox-installer_11.04ubuntu1_i386.deb) ...
Unpacking replacement kubuntu-firefox-installer ...
dpkg: error processing /var/cache/apt/archives/kubuntu-firefox-installer_11.04ubuntu1_i386.deb (--unpack):
 trying to overwrite '/usr/share/applications/firefox.desktop', which is also in package firefox 4.0~b11+build3+nobinonly-0ubuntu2