Mozilla clips the edges of blurred shapes

Hi guys,

I've noticed that Mozilla clips the edges of SVG shapes that have been
applied a blur filter. It seems like the renderer creates some kind of
a bounding box around the shape, but fails to extend it after the blur
is applied, so the blurred edges of the shape appear clipped.

Here is a small test SVG to show the problem (generated with Inkscape,
exported as "plain SVG"):
http://valan.net/tmp/mozilla/clipped_edges_of_blurred_shapes.test.svg

Here is the Inkscape output, which looks fine:
http://valan.net/tmp/mozilla/clipped_edges_of_blurred_shapes.inkscape-output.png

Here is the Mozilla (FF 3.1 beta) output where the four edges appear
clipped:
http://valan.net/tmp/mozilla/clipped_edges_of_blurred_shapes.mozilla-output.png


~ Vladimir Dzhuvinov