http://www.w3.org/Amaya/ is a kind of reference browser from the W3C. The release history lists the first SVG support in Amaya 4.0 from 10 November, 2000.
Amaya does not render correctly the most basic SVG files. Even IE6 would make a better reference implementation of web standards.
Batik seems to be the most well-tested and conformant implementation of SVG at the moment: http://xmlgraphics.apache.org/batik/status.html, though I would use WebKit as reference because of it's market share and potential of Google and Apple to change the SVG spec.
Batik seems to be the most well-tested and conformant implementation of SVG at the moment: http://xmlgraphics.apache.org/batik/status.html, though I would use WebKit as reference because of it's market share and potential of Google and Apple to change the SVG spec.