nobody?

I also encountered an other problem: I'm using a QGraphicsView in a QStackedWidget as my centralwidget in a QMainwindow. Now I noticed that the bigger the window gets the slower my application gets. First I thought thats because there is more to display - but there isn't. I'm showing the exact same thing (couple pictures which can freely be moved and zoomed). If my window size is lets say 640x480 and I'm displaying 20 pictures its much faster than if my window is 1280x1024 and I'm displaying 20 pictures (in the exact same zoom level). Am I doing something wrong?