L950, ATT
This build has the same BT issue of showing CONNECTED when the BT device is off. In that state, audio is routed to the non-existent BT device and as a result the phone does not ring or notify.
I believe what is happening is that if the phone goes to sleep in the connected state, it sometimes loses track of the connection status, which is NOT refreshed the next time the BT device is available. This morning I tested BT by connecting to my BT earpiece and then just leaving the phone alone. A couple minutes after the screen turned off, my earpiece announced that the phone was disconnected. When I turned the screen on, the BT icon was still present but the earpiece was still not connected. Power cycling the earpiece did NOT restore connection.
This earpiece works flawlessly with my Android phone, my PC and a two way radio I have that has BT. The only issue is with the L950. And since I can't upvote my own feedback I guess all I can do is wait for MS to get with it.
Paul