is it possible to use the 0 second antishock feature when shooting high speed w/ the ep5? it looks like the little diamond denotes when the antishock is available. if i try going from single shot to high speed shooting, i see a high speed option w/ the little diamond, but it's grayed out. i can only select the regular high speed option. i've been told the oly menus are difficult to navigate at times. perhaps i need to change a setting elsewhere before the high speed antishock option shows as available? anyone know?