First quick grep i did in overlay points out: app-cdr/k9copy/k9copy-9999.ebuild:IUSE="debug +handbook" dev-util/kxsldbg/kxsldbg-9999.ebuild:IUSE="debug +handbook" dev-vcs/kdesvn/kdesvn-9999.ebuild:IUSE="debug +handbook" kde-base/kdebase-runtime-meta/kdebase-runtime-meta-4.6.9999.ebuild:IUSE="+handbook semantic-desktop" kde-base/kdebase-runtime-meta/kdebase-runtime-meta-9999.ebuild:IUSE="+handbook semantic-desktop" kde-base/kdelibs/kdelibs-4.6.9999.ebuild:IUSE="3dnow acl alsa altivec bindist +bzip2 debug doc fam +handbook jpeg2k kerberos kde-base/kdelibs/kdelibs-9999.ebuild:IUSE="3dnow acl alsa altivec bindist +bzip2 debug doc fam +handbook jpeg2k kerberos kde-base/kdesdk-scripts/kdesdk-scripts-4.6.9999.ebuild:IUSE="+handbook debug" kde-base/kdesdk-scripts/kdesdk-scripts-9999.ebuild:IUSE="+handbook debug" kde-base/printer-applet/printer-applet-4.6.9999.ebuild:IUSE="+handbook" kde-base/printer-applet/printer-applet-9999.ebuild:IUSE="+handbook" kde-misc/kappfinder/kappfinder-9999.ebuild:IUSE="debug +handbook" Please fix them.
I think it is fixed now. The only ebuilds I didn't touch is kdelibs one (due to circular dependencies) and the kdebase-runtime-meta.
thanks, closing