I also have a HTC Nexus One, latest Android OS 2.3.6, installed just a few days ago. After the update, the phone would not connect to the car (MMI console doesn't show anything when bluetooth is activated). Until then, it was working, with the occasional error. During a call I would still hear the person on the other end, but they could not hear me. Turning the car's ignition off and then on would fix the problem, but the phone would sometimes go dead. Now, it's not working at all. The Audi service tech says they tried with iPhone and Samsung and it's working fine, but that was before the update to the latest OS version. Now, it's not working at all. Any clues? Anybody with the same problem? Ciao.