After two diversions last week to IAH, it looks like United has changed models of the 767 aircraft from the 767-400 (76H) to the 767-400 ER V2. According to what I see on Seat Guru, the new(er) aircraft has lay flat seats, AC power, and AVOD.
Does anyone think this is a permanent change? Sure would add alot to the BF experience on such a long flight.