Tavmjong:
Cool. Thanks for checking these! I guess that a couple of the problem formats are mine:
.odg. Small translation problems.
ODG is a bitch to export. Why? Because the spec is written in Ancient Vague.
But also contributing to it is Inkscape's unfortunate Y-flip causing a mirror to rotations which mess other transforms up, too. Check out recent Reddit articles on SVD's. Since Inkscape stores a single transform for an object, and not a list or tree of the individual transforms from which it is composed, it is difficult to guess them from the single transform. So we use an SVD on the transform to try to pull it apart into the pieces. It's almost like a knapsack problem.
.pov Broken in v0.47. Extra lines are added to object descriptions. Works in v0.46 (some paths missing).
Easier to read, and more easily fixed. You have the output file for this? This is probably a quickie. I -LOVE- POVRay output of Inkscape thingies.
http://inkscape.modevia.com/win32_inkscape_org/pov/
bob