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Extracting templates from packages: 100%
Preconfiguring packages ...
(Reading database ... 117030 files and directories currently installed.)
Unpacking gutsy-wallpapers (from .../gutsy-wallpapers_0.17_all.deb) ...
dpkg: error processing /var/cache/apt/archives/gutsy-wallpapers_0.17_all.deb (--unpack):
 trying to overwrite `/usr/share/backgrounds/warty-final-ubuntu.png', which is also in package edgy-wallpapers
dpkg-deb: subprocess paste killed by signal (Broken pipe)
Errors were encountered while processing:
 /var/cache/apt/archives/gutsy-wallpapers_0.17_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
root@poznansquawk:/etc/apt#