How do you scale a element without affecting the border-radius?

Question

Currently my webkit transform for scaling would affect the border radius, making it distorted. Is there any css3 hack that will allow me to preserve the rounded corners? Example

Answer 1

Just manually manipulate the width and height, rather than using scaling:

#pan {
    width:500px;
    height:500px;
    position:relative;
    background:#aaa;
}

#rec {
    width:100px;
    height:100px;
    position:absolute;
    top:250px;
    left:250px;
    background:#fff;
    -webkit-transition:500ms cubic-bezier(0.785, 0.135, 0.000, 0.940)
}

#rec:hover{
    /*-webkit-transform:scale(3.5,1);*/
    width:300px;
    left:150px;
    -webkit-transition:500ms linear; 
    -webkit-border-radius:35px;
}

<div id="pan">
  <div id="rec"></div>
</div>