The ebuild of kdebase-3.0.4-r2 has a little bug, which prevents the build from finishing, it doesn't find the gentoo diff for startkde. I guess patch -p0 < ${FILESDIR}/startkde-${PVR}-gentoo.diff should be patch -p0 < ${FILESDIR}/{PVR}/startkde-${P}-gentoo.diff
Actually it should be: patch -p0 < ${FILESDIR}/{PVR}/startkde-${PVR}-gentoo.diff
fixed, thanks for submission
*** Bug 10588 has been marked as a duplicate of this bug. ***