Wifi won't connect to some certain network after installing WP8.1 dev preview, even with the correct username and password, no matter manually or automatically, always says "Sorry, you phone can't connect to the network...".
It could potentially be the network's fault and WP8.1 is more susceptible.
My school has a meh network, sometimes its down, sometimes things refuse to connect and my 920 has actually been reliable with it on 8.0 and 8.1. Although it seemed slightly more temperamental on 8.1.
Same here. I can connect on my home network, but not at work. It was fine before the switch to 8.1. I'm hoping to hear of a fix soon. I'm in a building with no cell signal, only wifi. I feel cut off!
A little update. I was messing around trying to set up a network from my iMac since I can't access the main wifi setting here at work. I noticed that I could connect if I turned security off. Its only after I turn WPA2 Personal (the only setting available on a mac) on that I have an issue connecting. It could be that certain security setting are causing the connection issues.