I just wanted to report I experienced my new Wii U freezing while searching for content in the Youtube app. It happened twice. Normal operation resumed only after a hard power cycle. Hopefully enough of these reports will help to find a solution. -napynap
Some details to help support:
System: Wii U Deluxe
Network connection: Wireless N 2.4ghz, WPA2 mixed, DHCP.
Software: Day1 patch with some apps; Transfered Wii data to Wii-U; Had not yet inserted any discs to play/install
Video/Audio Output: Nintendo HDMI cable -> Denon 3D Receiver -> Sony Bravia HDTV