'dev-qt/qtgui:4[dbus(+)]' is now pointless, akonadi-server-1.10.2-r1.ebuild already has qtdbus dep, most likely it does not need qdbusviewer, so the dep should be changed to 'dev-qt/qtgui:4'. akonadi-server-1.9.2.ebuild still has missing qtdbus dep, see https://bugs.gentoo.org/show_bug.cgi?id=478222#c4
Thanks, fixed in CVS and git. + 08 Sep 2013; Michael Palimaka <kensington@gentoo.org> + akonadi-server-1.10.2-r1.ebuild, akonadi-server-1.9.2.ebuild: + Correct dependencies wrt bug #484166. http://git.overlays.gentoo.org/gitweb/?p=proj/kde.git;a=commit;h=e3c9bbaeb78a3af32bd7658c6dfb1dee61c1cfc1