On the G2, at least, when you're in play mode you can select a menu option of "rotate". Then as you go through the pictures, if one was taken vertically, press the "set" button once to rotate right 90 degrees (and again for more). Is this how the 110 does it?

Wow, I didn't even know you could do that. Yes, that's how the S110 works, now that I've tried it. Nice! Thanks!