dan@dan:~$ sudo apt-get upgrade
Reading package lists... Done
Building dependency tree... Done
The following packages will be upgraded:
  kdelibs-data
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 0B/8013kB of archives.
After unpacking 0B of additional disk space will be used.
Do you want to continue [Y/n]? y

Preconfiguring packages ...
(Reading database ... 58218 files and directories currently installed.)
Preparing to replace kdelibs-data 4:3.4.0-0ubuntu3 (using .../kdelibs-data_4%3a3.4.0-0ubuntu3.1_all.deb) ...
Unpacking replacement kdelibs-data ...
dpkg: error processing /var/cache/apt/archives/kdelibs-data_4%3a3.4.0-0ubuntu3.1_all.deb (--unpack):
 trying to overwrite `/usr/share/icons/default.kde', which is also in package knetworkconf
Errors were encountered while processing:
 /var/cache/apt/archives/kdelibs-data_4%3a3.4.0-0ubuntu3.1_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
dan@dan:~$