Well, admittedly, it has been a long time since I have used an on board flash on any camera, much less the G5 I bought in November, but the effect I just saw on a shot of my cats seems really odd. I saw a nice cat configuration and grabbed the G5, didn't take time to affix the hot shoe mount flash and shot away at the shortest focal length (14mm with the std 14-42) with the hood attached. The result was a cinder cone like shadow coming up from the bottom of the frame of each shot. I took off the hood and the shadow was gone. Mounted the external flash and no shadow. Ran the lens out to 42mm and the shadow disappeared at about 30mm. So, effectively, the std lens/onboard flash combo will not produce a usable image at less than 30mm or without removing the lens hood. Panasonic folks say this is a noted issue, but not a defect. If the built in flash zaps images at all but the longest focal length if the hood is used, one would think that this would be documented. Maybe it is somewhere in the manual, but I didn't see it. I can simply use my external flash, but the camera was originally fitted with a built in flash and a 14-42 lens. One would think that they would be designed to work together.