[petercooper]

Every major current generation browser and last generation browser supports SVG images except IE 8. So IE 8 users just wouldn't see the icons - not a big loss since I suspect IE 8 users make up a tiny amount of the user base.

[dudus]

There are pollyfils to degrade SVG into VML or een flash for ie8, ie7 and ie6.

https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Brow...

I don't mean that it's pretty. I'm just saying that it's possible