This edit changed a link from
http://www.amazon.com/Modern-Method-Guitar-DVD-ROM-Berklee/dp/0876390696/ref=pd_bxgy_b_img_b
to
http://www.amazon.com/Modern-Method-Guitar-DVD-ROM-Berklee/dp/0876390696/
What does the "ref" parameter to, and why should (or shouldn't) we remove it?
I'd like to know so that I can approve (or reject) the proposed edit.