Updating to PowerGallery 1.2.0 -my experience.
Went through the upgrade this morning, following the instructions at updating_120.php. A little bit of fear and trembling since everything was working fine for me and I wondered if I really wanted to mess with it.
Thought I'd let you know your instructions were easy to follow and worked like a charm. I did not overwrite my Connections & Images folder, per your instructions and I made a copy of my customized gallery index.php file which I could upload afterwords so I didn't have to re-create it.
So if anyone else is wondering, my experience is if you follow the instructions, it's quick, easy and there's no problems at all.