Hi!
I had the same problem.
I found a sulotion!!
Follow this Youtube clip. It worked for me. But how to make it to be like "one" picture that does not scrolls and not like topp middle and bottom box backgrounds as it is now. But I want it to cover the same area still. Any tutorials on that?
My page: www.slottskogen.com/prestashop
Youtube: www.youtube.com/watch?v=KSfBhZ3bS90