[oXygen-user] Defect in SVG viewer

I created an SVG document with - I believe - a version of oXygen in the 15.x series, about two years ago. I just opened it in oXygen to edit it, and it no longer renders correctly in oXygen. In the Mac Finder, Safari, and Firefox, it still does render correctly. Are there any known defects? If not, whom should I send the SVG to to create a defect report? Thanks.