Does a cache buster on an image URL in CSS cause an extra request?

Question

If I add a cache buster to an image URL in one rule in my CSS

background: url(../img/sprite.png?version=20130205) no-repeat -75px -208px;

b

Answer 1

Yes it will cause a new request for the image. If it is ? the image will reload.

If you don't want to make new request use # in example

background: url(../img/sprite.png#version=20130205) no-repeat -75px -208px;

Answer 2

Yes, you got it right. All points. When the portion following the ? differs, it always reloads.