-moz-border-radius:15px;
-moz-border-radius-topleft:15px;
-moz-border-radius-topright:15px;
-moz-border-radius-bottomleft:15px;
-moz-border-radius-bottomright:15px;
-webkit-border-radius:15px;
-webkit-border-top-left-radius:15px;
-webkit-border-top-right-radius:15px;
-webkit-border-bottom-left-radius:15px;
-webkit-border-bottom-right-radius:15px;
Microsoft announced in March 2010 their compliance with next generation; CSS3 in Internet Explorer 9
Opera still waiting...