ORIGINAL: N1EDM
If no one else answers, I'll venture a guess. Don't have G3 myself, so this is just a stab in the dark.
I'm curious about what size file you're using. I'm wondering if you took a photo at a higher resolution (i.e., a larger file size), would that make a difference?
Just for the fun of it, take photos of the same item (even in your back yard) at different resolutions and try loading each of them.
I've tried sizes from 2 Mega Pixel to 8 Mega Pixel all look bad in a different way! There is something simple I expect that I just don't know.