I was testing this GF-3 on clearance today and I almost pulled the trigger when I noticed something peculiar. It seems the aperture blades would close up, not all the way but midway during focusing. I made sure to check that it wasn't in the Custom mode which allows for DOF preview and it wasn't. Also, the positioning of the blades didn't seem consistent with the chosen F-stop. They seemed to open up when taking shots, there was no card in the camera so I had little time to determine if they were properly exposed or not but what I saw from the quick previews seemed ok. Any clue as to what may be causing this? I don't have my own GF-3 with me now but I'm pretty sure I've never noticed this before. Maybe it's some kind of setting or metering mode that causes this, or maybe it's a mechanical thing with the blades themselves? Any input would be helpful. Thanks.