If you combine both of these techniques, this is what you get. A rounded corner box that works on both Safari and Firefox. I have to admit that I have no idea what this technique would look like if either browser supported both properties, but hopefully it won't look too bad. I guess we'll just have to wait and see. Now if only the CSS working group could pull their fingers out and come to some kind of consensus as I really don't want to have to wait another 5 years before we can start doing this on our sites. By that time I imagine we'll be surging web 5.0 3d and rounded corners will be retro.