Ok. I've updated my iPhone4 and AppleTV2 to the latest update and I've had nothing but problems all day... with the iPhone! - With the new iOS, WI-FI is non-existant on 802.11n (2.4gHz... yes, I know). It was rather fast with iOS v4 but today's update killed it. Using the Speedtest app gave me a bandwidth measurement of 0.00 on both upload AND download. No, I'm not kidding. I also switched over to another Wi-Fi network and same crap. Another iPhone4 on iOS v4 has NO problem on same networks. - AirPlay from the iPhone4 to the AppleTV2 doesn't work. It's probably related to the lack of Wi-Fi on the iPhone4, so no surprise there. I'm "restoring from factory defaults" to troubleshoot this further. Does anyone know how to restore back to v4? Thanks.