It's a G4 running 10.5. It's like the (to be closed) window is kindof "zooming out", but the positions of these mentioned rectangles do not go with chg positions of the window. of course it's only being visible so long because of my memory issues while handling a bigger plan
So, there is no negative side effect that comes along with this, i can live with it, anyway 
greets
macfrog
