I need to compare with another program, sory xara team, well, Corel Draw has the same problem, it's seems that when you deform a shape you don't loose the original form, it's just showed distorted on the screen. I way to solve that is actualy change the shape structure and make the rounded edges based on circles (logical hum) whith a variable width, the Corel aplication work it in a interesting way, it make all the 4 corners of the shape editable and each one may take a circle with a diferent width making a cool effect.