I got a few errors with dbus and consolekit, which caused KDM to show windows without the resize/min/max buttons, and a few error message popups. [ebuild U ] kde-base/kpdf-3.5.10-r1 [3.5.9] USE="-debug (-arts%) (-kdeenablefinal%) (-xinerama%)" 6 k B  [nomerge ] app-mobilephone/pysmssend-1.32 USE="qt4" [?
Portage should be able, somehow, to handle these dependency problems and provide a custom error when such a problem occurs.
The following is the output of emerge -u DNavt world: Then they explained to me that there has been a change on QT eclass to provide protection to the system from having mixed QT versions.
The problem is that the protection works by blocking the mix, but the output is at least “unfriendly”.
So I joined #gentoo-el on Freenode to ask the greek gentoo developers (hwoarang, deathwing00, tampakrap, wired, yngwin), which happen to be on QT/KDE herds, to explain to me what’s wrong.
I was suggested to run an to upgrade my whole system, but that’s not what I wanted and I asked for a solution that would not involve upgrading the whole system.