Preconfiguring packages ...dpkg - warning: downgrading gconf2 from 2.12.1-4ubuntu1 to 2.12.0-0ubuntu1.(Reading database ... 65137 files and directories currently installed.)Preparing to replace gconf2 2.12.1-4ubuntu1 (using .../gconf2_2.12.0-0ubuntu1_i386.deb) ...Unpacking replacement gconf2 ...dpkg: error processing /var/cache/apt/archives/gconf2_2.12.0-0ubuntu1_i386.deb (--unpack): trying to overwrite `/usr/share/sgml/gconf/gconf-1.0.dtd', which is also in package gconf2-commondpkg-deb: subprocess paste killed by signal (Broken pipe)dpkg - warning: downgrading libgconf2-4 from 2.12.1-4ubuntu1 to 2.12.0-0ubuntu1.dpkg: regarding .../libgconf2-4_2.12.0-0ubuntu1_i386.deb containing libgconf2-4: gconf2 conflicts with libgconf2-4 (<< 2.12.1-4ubuntu1)  libgconf2-4 (version 2.12.0-0ubuntu1) is to be installed.dpkg: error processing /var/cache/apt/archives/libgconf2-4_2.12.0-0ubuntu1_i386.deb (--unpack): conflicting packages - not installing libgconf2-4Errors were encountered while processing: /var/cache/apt/archives/gconf2_2.12.0-0ubuntu1_i386.deb /var/cache/apt/archives/libgconf2-4_2.12.0-0ubuntu1_i386.debE: Sub-process /usr/bin/dpkg returned an error code (1)