Comment 10 for bug 674109

> The second is that you can not directly edit a pattern assigned to a group.

It works with the shape tools, but not the node tool - seems the same issue as it was with text objects, see
<http://article.gmane.org/gmane.comp.graphics.inkscape.devel/35286> and
<http://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/9868>