I have a weird issue when using box-shadow to apply a padding to the left and right side of a span which has its contents wrapping inside a container:
box-shadow:9px 0px 0px red, -9px 0px 0px red;
It applies the left shadow only to the first line, and the right shadow only to the last line.
http://jsfiddle.net/3zeL5ux8/2/ is a testcase that works as expected in Chrome and various IE versions (see http://imgur.com/XhX1kco for a perfect rendering), why does Firefox mess it up?