After installing Leopard 10.5, my Intel iMac mouse is always jumping to any of the corners of the screen whenever I'm trying scroll a window, pulling a menu option or when I just pass the mouse over a button, link or any other feature that normally react to the mouse cursor. This is really frustrating. Is there a workaround for this problem? I already update to 10.5.1 and the problem seems to be even worse. Donlobeto.