I am noticing something strange with my E-PL1. When I have anti-shock mode turned on and the built-in flash popped up, the flash actually fires twice when the shutter release is pressed. I have left the flash settings at factory default. The flash fires once just before the anti-shock duration kicks in and the LV blacks out. The flash fires again when the exposure starts. Is the first flash actually the preflash for metering -- and it has to fire before the LV blackout because the reading is taken off the sensor? If it is indeed the preflash -- it actually looks way too strong. Anyone noticed this with their E-PL1 or other Oly m4/3 bodies that support anti-shock? What could be the explanation for this?