I've just noticed that Inkscape's SVG format doesn't work in cairo for the few drawings we tried - when we save as Plain SVG, they appear correctly. Not sure this is a universal problem but with the advent of Firefox SVG based on Cairo and the soon to be popularity of Cairo and XML in general, it might begin to confuse users that Inkscape's SVG is not Plain SVG and their svg drawings might not show correctly. We're already confused with whether a *.svg drawing is in Inkscape mode or Plain mode - obviously we can parse the xml code but just is more work. Also not sure how this plays out in Safari, Konqueror, or Opera. I would assume this might also affect Inkscape submissions to Open Clip Art which I would assume is standardized on the Plain SVG ? I would like to suggest: 1) make the Plain SVG as the default 2) rename the Inkscape SVG as something like *.svgi