Wifi

I know there are tons of posts on this topic, so I'm assuming it's a bug and I have to live with it. But, just want to make sure. I hardly use Wifi, and wanted to connect to it to update an app. It asked me to select my network and type in a password, but then the buttons are grayed out so nothing happens. Wifi was working before the iOS6 update. It's not my home Wifi because I use my Mac and my iPad on Wifi and they both work fine.

This is an iOS6 bug, right? It's not my phone (4S) and there is no point in going to the genius bar is there? I'd like to fix it, however. Kind of annoying.