I have previously read about Javascript ways to make rounded corners but non of the suggested techniques produced antialiased (smooth) corners making me skeptic about the whole concept but curvyCorners proved me wrong – nice rounded corners with arbitrary radius, options for anti-aliasing and borders – Great work Cameron! I also tried the YUI compressor and was able to reduce the size significantly compared to the light version provided. If there is interest I can upload the compressed version.

As usual a demo is worth thousand words