Firefox screenshot after rendering the page
OK, I better start by stating this post’s title is actually a pun: as far as I know, Emacs doesn’t cause any interoperability issues with SVG implementations, but I thought like a sensationalist headline from time to time won’t hurt… 
Today I stumbled across emacsformacosx.com, a nice HTML+SVG use-case: HTML for the actual text content and SVG for visual improvements, which would degrade whenever no support is available (Internet Explorer, essentially). Unfortunately, the site seems to have triggered a few bugs in several implementations… 