emerge $(qlist -IvC qt | grep 4.8 | sed s/-4.8.*$//g)
It doesn't help here, still I am unable to update :(
dev-qt/qtgui:4
(dev-qt/qtgui-4.8.5::gentoo, ebuild scheduled for merge) pulled in by
>=dev-qt/qtgui-4.8.5:4[accessibility,dbus(+)] required by (kde-base/kontact-4.10.5::gentoo ...