I planned to do a webcast at a reception using the hotel's wi-fi. For some reason, every time I start Ustreaming, my iPhone 4S immediately lost its wi-fi connection. This didn't happen when I was testing at home.
When I switched to a friend's older iPhone 3 the connection stayed up the whole time.
Also, before I started streaming I turned off Location Services for a bunch of apps on my 4S, hoping to reduce battery use. Now my Location Settings is permanently locked in the OFF position and I can't turn it on. So it is possible that something funky in the Settings that's causing this, I'm not sure.
I had not installed the latest iOS patch at the time.