I have a strange problem with KDE 4. I'm not sure if it's a glitch or a settings problem. Basicly, my icons on the desktop always have a dark square around them, as if my mouse was hovering over them, but the squares never go away.

Also on the bottom right, on the task bar, all the smaller icons have flat black square around them. Those square look like glitches but, the deskop icons don't.

Anyway know what the problem could be?