When adding a drop shadow to an object, even a basic shape, it is not displaying correctly. For example, used the shape tool to create a square with rounded corners. When applying the drop shadow, it puts a shadow with hard, squared off edges. But if I change the zoom to 63% or higher it shows the shadow with rounded corners and moves it to the right more. But if I change the zoom back to 54% or lower, it's back to having hard edges and position has moved. When trying to use a shadow with a further distance the problem is even more pronounced. It looks like the shadow hits a wall on the left and bottom--very hard edge. But again, if I change the zoom to above 63% it displays correctly.