I am on an A2 currently. After I had gone through so much trouble with wireless. 1.21 is okay, but still has problems. Puffnstuff is a bit crazy. I've never had problems with RTSP pages, and it's more than likely on his own end. My router has never rebooted either.
The only problems currently that I've seen is still broken UPnP, WAN and WLAN slowdown, and bad streaming. Possibly broken GameFuel.