SVG Linear gradient doesn't work in Safari

I've got an SVG object that contains a linear gradient embedded directly in a document. It works fine in Chrome and Firefox, but in Safari nothing is rendered. If I create the SVG as a file and embed it using the Object tag, it works fine in Safari. Other shapes and fills work, it's just linear gradient that doesn't work. I guess I could use the object, but I'd prefer to embed the SVG directly.

I've create a demo here (works in Chrome, not Safari): http://jsfiddle.net/sjKbN/

I came across this answer which suggests setting the content type to application/xhtml+xml, but this in itself seems to cause other problems.

Just wondering if anyone had come across any other fixes or ideas to get this working.

Solution

Your gradient will work in Safari if you wrap a defs tag around it:

<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
     width="300px" height="300px" viewBox="0 0 300 300" enable-background="new 0 0 300 300" xml:space="preserve">
 <defs>
<linearGradient id="SVGID_1_" gradientUnits="userSpaceOnUse" x1="5.6665" y1="149.5" x2="293.333" y2="149.5">
    <stop  offset="0" style="stop-color:#FFF33B"/>
    <stop  offset="0.0595" style="stop-color:#FFE029"/>
    <stop  offset="0.1303" style="stop-color:#FFD218"/>
    <stop  offset="0.2032" style="stop-color:#FEC90F"/>
    <stop  offset="0.2809" style="stop-color:#FDC70C"/>
    <stop  offset="0.6685" style="stop-color:#F3903F"/>
    <stop  offset="0.8876" style="stop-color:#ED683C"/>
    <stop  offset="1" style="stop-color:#E93E3A"/>
</linearGradient>
</defs>
<rect x="5.667" y="5.333" fill="url(#SVGID_1_)" width="287.667" height="288.333"/>
</svg>

It seems that wrapping your references in defs is encouraged but not obligatory according to spec. So this is a bug in Safari.