I don't think we have any reftests for SVG as a tiled CSS background. (Or at least, we don't have sufficient coverage, because Seth noticed that one of his patches seemed to break some situations with tiled CSS backgrounds, without breaking any reftests.) We should add some.
Not sure if this is the place for this or not, but seems related. When using background-size and SVG, the SVG will scale up but not retain it's crispness. Like it's converted to an image at 100% then scaled up. Test: http://codepen.io/designerdean/pen/bhqKA
(In reply to Chris Coyier from comment #1) > Not sure if this is the place for this or not, but seems related. (When in doubt, file a new bug.) But don't do that in this case, because -- good news! -- the issue you brought up is already fixed in nightly, likely as part of bug 600207. I can reproduce the fuzziness in your codepen on Firefox release (ver 22), but it looks nice and cris in Firefox Nightly (ver 25).
er "nice and crisp"
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