It's great to see that KDE-sc re-added multi-head with release 4.7, but there are a few closely related outstanding issues. I'm saying so here because I really don't know which things they belong to.

1) krunner only shows up on the first screen.
2) If an instance of an app (for sake of example, lets say Konsole) is open on one screen, and you try to open another instance on another screen, it will open another instance on the screen that already has an instance running.
3) Are global shortcuts not global across screens? If not, could they be? (A real example, say we have Clementine with next track bound to XF86AudioNext, and Clementine is running in the third screen. If I'm working in the first screen and push XF86AudioNext nothing will happen.)
4) Kind of hard to pin down, but this happens sometimes. Lets say I'm working in screen 2, finish doing whatever with an app, and then close it. Sometimes the focus will jump to whatever I was working on previously in another screen ... Very annoying. It shouldn't change focus to anything in another screen unless I mouse over to that screen and explicitly give it focus, even if I have no longer have anything open in the screen with focus.