G15 distortion?

I'm not happy about the distortion on my G15.
Objects seem "bent". I think its pincushion distortion.
People look out of proportion to each other when standing together when they aren't all in a straight line.
The camera tends to over expose a lot too.

At what zoom setting does the distortion occur?

At it's widest angle, any 28mm may distort perspective a little. Try zooming in between 35 - 50mm, move further back and take the group shot. It helped my G9.

Lens distortion can be used effectively and help in a creative composition.