Preparing to replace openjdk-6-jre-headless 6b20-1.9-0ubuntu1 (using .../openjdk-6-jre-headless_6b22-1.10.6-0ubuntu1_i386.deb) ...
Unpacking replacement openjdk-6-jre-headless ...
Selecting previously deselected package icedtea-netx.
Unpacking icedtea-netx (from .../icedtea-netx_1.1.1-0ubuntu1~11.04.2_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/icedtea-netx_1.1.1-0ubuntu1~11.04.2_i386.deb (--unpack):
 trying to overwrite '/usr/lib/jvm/java-6-openjdk/jre/bin/javaws', which is also in package openjdk-6-jre 6b20-1.9-0ubuntu1
Selecting previously deselected package icedtea-plugin.
Unpacking icedtea-plugin (from .../icedtea-plugin_1.1.1-0ubuntu1~11.04.2_i386.deb) ...
dpkg: error processing /var/cache/apt/archives/icedtea-plugin_1.1.1-0ubuntu1~11.04.2_i386.deb (--unpack):
 trying to overwrite '/usr/lib/jvm/java-6-openjdk/jre/lib/i386/IcedTeaPlugin.so', which is also in package icedtea6-plugin 6b20-1.9-0ubuntu1