I’ve just updated my KDE SC to 4.9.5 version thanks to the qt-kde repository.
I’ve updated my system to the last unstable packages with:
And finally I’ve just used the default instructions from qt-kde and apart from having to uninstall a qtcurve package everything went fine.
Now I can setup a window or application by its name or class into a given activity (or all of the activities) automatically.
And Dolphin seems way faster than before as it was announced.