         let lowerRight = lowerLeft + Offset(x: frame.width - 1)
         let upperRight = lowerRight + Offset(x: -xOffset, y: -height - 0.5)
 
-        let curve = CGFloat(3)
+        let curve = CGFloat(4)
 
         let path = NSBezierPath()
 

        
        // Before aligning to the top, make a slight curve.
        let leftRisingFromPoint = lowerLeft + Offset(x: curve)
        let leftRisingToPoint = lowerLeft + Offset(x: curve, y: curve)
        path.appendBezierPathWithArcFromPoint(leftRisingFromPoint, toPoint: leftRisingToPoint, radius: curve)

        // Before reaching the top, stop at the point of the coming curve

        
        // Before aligning to fall down, make a slight curve
        let rightFallingFromPoint = upperRight + Offset(x: curve)
        let rightFallingToPoint = upperRight + Offset(x: curve, y: curve)
        path.appendBezierPathWithArcFromPoint(rightFallingFromPoint, toPoint: rightFallingToPoint, radius: curve)

        // Before reaching the bottom right, stop at the point of the coming curve
        let rightBottomingPoint = lowerRight + Offset(x: -curve, y: -curve)
        path.lineToPoint(rightBottomingPoint)
        
        // Curve to the bottom
