Still not reproduced on Debian testing, Inkscape 0.48.3.1, 0.48.4 and trunk revision 12150. Tested with the file from comment #9, linked or embedded, and didn't manage to crash Inkscape with the color extensions.
Still not reproduced on Debian testing, Inkscape 0.48.3.1, 0.48.4 and trunk revision 12150.
Tested with the file from comment #9, linked or embedded, and didn't manage to crash Inkscape with the color extensions.