Regarding SVG standard: http://www.w3.org/TR/SVG11/coords.html#TransformAttribute says: "The individual transform definitions are separated by whitespace and/or a comma." So it's definitly a bug if inkscape doesn't accept comma.
Regarding SVG standard: http:// www.w3. org/TR/ SVG11/coords. html#TransformA ttribute says: "The individual transform definitions are separated by whitespace and/or a comma." So it's definitly a bug if inkscape doesn't accept comma.