Bought 5 devices, all have the same serialnumber and even the same "unique" chipID. Settings in Eeprom can't be changed. Bitbang mode is not working. Serial loop back seems to be working. Xray images shows that this chip, datecode 1412G, is indentical to an old one, datecode 0550A. This chip is fake, or some one at FTDI is selling not tested, not programmed, or even rejected chips. Wrote FTDI about it. They claim there is no revision G.