Curvy Corner Options

That's actually a different package than curvycorners (http://plugins.jquery.com/project/curvy-corners).

Corners has some neat features like the various cornering, but the issue is that it works on colored div's (ie style="background-color:somecolor") and if you want a rounded border, you actually have two div's (an outer and inner) and apply the cornering to both of them.

CurvyCorners actually corners the container itself.