Comment 2 for bug 1259371

Yes, currently only 'rect' tags are loaded from the svg files. Everything else is ignored. There used to be ancient code to represent arbitrary polygons, but that was never fully implemented.
It would make sense, though, if only for the common return key shape.
No promise, but I'd like to try and add polyline support. Would you attach an archive of your layout, please? This would save me some time.