Unfortunately I face the same problem. It is also the reason why
kdegraphics and kde4 packages cannot be properly installed.
"Unpacking kolourpaint4 (from .../kolourpaint4_4%3a4.0.84-1_i386.deb) ...
dpkg: error processing
trying to overwrite
`/usr/share/icons/hicolor/scalable/apps/kolourpaint.svgz', which is
alsoin package kolourpaint
dpkg-deb: subprocess paste killed by signal (Broken pipe)".
Hope it can be fixed.