Here's a couple of things for you,
1) The update that you performed was for the radio SW only and has nothing to do with the Uconnect module, the radio and Uconnect are 2 separate components.
2) The update that is being mentioned here is for the Uconnect modules in 2011 vehicles with the Mitsubishi radios (RBZ, RHB, RES & REQ) and will not work on the 2010 vehicles.
3) You mentioned wanting the "Mute feature" to work. Can you describe this issue for me, meaning are you talking about using "Mute" from the radio screen?
4) Have you tried to use VR (voice recognition) commands for "Mute".
(during a phone call try pressing the voice button and say "mute". UC should reply back with "Mute On", when you want the mute off again, press the UC button and say "Mute Off", she will reply back that mute is off.
Let me know if this helps.
I've been reading this thread with great interest as it seems to have the most information on the RBZ radio.
I have a '10 Grand Caravan with the RBZ (non Nav). I ran the 8.05.01 software update yesterday in hopes that it might add the Mute feature for the UConnect.
My lack of knowledge seems to indicate that this update had nothing to do with UConnect but perhaps the update you're discussing here will help the IPhone 3GS functionality.
My only question is..Could this update be of use in a 2010 RBZ?
Thanks to all those who have already shared their information and Thanks to anyone who helps with my question!