V2.1

"Noticed a call to a non-existent function.  (Left over from prior life of this code.)  Would not affect content generated by Inkscape, but could affect SVG content generated elsewhere and loaded into Inkscape."

From <http://www.thingiverse.com/thing:25036>.
Version 3

From <http://www.thingiverse.com/thing:25036>.
Version 5

From <http://www.thingiverse.com/thing:25036>.
Version 6

From <http://www.thingiverse.com/thing:25036>.