Gian Paolo Mureddu wrote:
The Blur effect to the best of my understanding is a feature local to Inkscape and as such it wont show on other SVG viewers. I'm not sure if there's a Blur effect in the official spec of the SVG file format or not, but the one in Inkscape (0.45.1, anyways) is local to the application.
Blur is part of the official spec.
http://www.w3.org/TR/SVG/filters.html#feGaussianBlur
Firefox 3 implements this particular filter but Firefox 2 does not.
http://developer.mozilla.org/en/docs/SVG_in_Firefox
The blur implementation in Inkscape 0.45.1 is not local to the application. It uses the feGaussianBlur filter. The Inset/Outset Halo effect available with prior versions of inkscape was also fully within the bounds of the spec.
Aaron Spike