I am new to the KDE desktop.
I am experienceing this reall annoying problem with my desktop:
When even I do something with a window, virtual desktop etc.... I get white blocks appearing on the top edge of elements, it seems.
I have included an image below.
This happens when I change workspace, open/close a window, sometimes when I open the Kickoff menu!
I am running on an Intel i5 (Sandybridge) laptop, with HD4000 graphics
Any help greatly appreciated