FWIW I'm seeing the same thing . Logs show: Code: trying to overwrite `/usr/share/icons/hicolor/scalable/hildon/gizmo-project.png', which is also in package gizmo-installer
trying to overwrite `/usr/share/icons/hicolor/scalable/hildon/gizmo-project.png', which is also in package gizmo-installer
dpkg --force-overwrite -i packagename.deb
apt-get -o DPkg::Options::="--force-overwrite" install packagename