Something odd has happened with my brand new 250. I turned it on today to check some settings before leaving on a shoot and the zebra button seems to be on the fritz. It is only toggling between zebra1 (70%) on and all zebra off. It is not activating zebra2 (100%). In fact, the display doesnt even indicate any zebra setting any more as it is supposed to as one toggles through the zebra settings. Yet if I go into the menu and activate "zebra2" the display will indicate the two different levels of zebra striping, as it's meant to. Is there something gone haywire with the firmware, or what?