As a jpeg shooter, I'm struggling to understand the behavior of the Dynamic Range (contrast) settings. It strikes me as odd that at ISO 200 I can only select DR=100%. At ISO 400 I can select DR=100% or 200%. At ISO 800 I can select DR= 100%, 200%, or 400%. Why should the sensitivity setting pose limitations on how much I can increase the DR? I posted this question at the X100 Forum too Dynamic Range Settings - X100 Forum. I repeat it here, not knowing which forum will provide the answer.