OS: CLD 11.3 x86_64

Делаем так:
eix-sync
emerge -uavDN @world

Получаем кучу блокировок (см. полностью прикреплённый лог)

[blocks B      ] kde-base/kdebase-data:4 ("kde-base/kdebase-data:4" is blocking kde-base/kdeplasma-addons-4.6.3)
[blocks B      ] kde-base/systemsettings:4 ("kde-base/systemsettings:4" is blocking kde-base/kcontrol-4.6.3)
[blocks B      ] kde-base/plasma-workspace:4 ("kde-base/plasma-workspace:4" is blocking kde-base/plasma-runtime-4.6.3)
[blocks B      ] kde-base/kdelibs:4 ("kde-base/kdelibs:4" is blocking kde-base/kdontchangethehostname-4.6.3, kde-base/plasma-runtime-4.6.3)

Aналогичные проблемы тут