I tried to patch Inkscape to make it use GNOME HIG-style frames [1] for consistency with the rest of GNOME and general attractiveness. For some odd reason I couldn't get it to show any difference.

It's in the (awful) sourceforge bug tracker if someone would like to take a look: https://sourceforge.net/tracker/?func=detail&atid=604308&aid=1677542...

[1] http://developer.gnome.org/projects/gup/hig/1.0/controls.html#controls-frame...