It might be useful to have a tool that generates random, weird SVG files. A similar tool for HTML, Zalewski's mangleme.cgi, turned up a lot of crash bugs in Gecko (tracked by bug 264944), including several potential security holes.
I've been fuzzing SVG elsewhere.
(In reply to comment #1) > I've been fuzzing SVG elsewhere. Please define "elsewhere": am I missing some project and/or bug which this has been/is currently being done? If so, stating that when closing this bug would have been useful... ;-) As were at it, I'd also take this opportunity to leave a link to SVG Torture Tests , a somehow related initiative. :-)  http://code.google.com/p/svgtorture/
Fuzz testers are security sensitive so you won't see them in public bugzilla bugs.