Opera 9.5 contains more than a year of improvements on the rendering engine. This includes improved CSS3 support (text-shadow anyone ), superior SVG support and a brand new javascript engine with support for ECMAScript 4 'getters' and 'setters'.
Opera 9.5 isn't out yet, even the weekly builds haven't started arriving. But it's nice to know Opera is giving so much support to SVG in future version. I've personally found Opera 9.21 to be almost flawless in displaying my own SVG work compared with Firefox 2 which has trouble with a number of elements.