Another odd thing happened on my camera today. Taking photos, then all of a sudden with the last one, the camera froze. - Nothing on the rear screen - Wouldn't turn off/on (light remained) - No response from any button Only thing I could do was remove the battery. On replacing the battery, it did it again. And again. Only sorted itself out when I replaced the battery with a new fully charged one. Is this normal behaviour for when the battery runs out?