the Contents/resources/extensions subfolder of the inkscape package and trying to run it inkscape complained:
Inkscape has received additional data from the script executed.
The script did not return an error, but this may indicate the results will not be as expected.
The fantastic lxml wrapper for libxml2 is required by inkex.py and therefore this extension. Please download and install the latest version from http://cheeseshop.python.org/pypi/lxml/, or install it through your package manager by a command like: sudo apt-get install python-lxml
the funny thing is: i got lxml installed, have already used it myself.
anyone got any ideas?