While not ideal, you can fallback to SVGWeb (using Flash 10) for older browsers. Some members of the Protovis community have released some updates to make this

While not ideal, you can fallback to SVGWeb (using Flash 10) for older browsers. Some members of the Protovis community have released some updates to make this work: https://groups.google.com/forum/#!topic/protovis/GoD5ihZzZlg https://groups.google.com/forum/#!topic/protovis/GoD5ihZzZlg