Let me explain what this TSB is for:\
When this TSB came out the supported build date was prior to April 18 2011. The problem was that there were vehicles that were built between April & June that had Uconnect modules with SW version 43.1.30. The 1st TSB only covered vehicles with SW version 43.1.10 & 43.1.20. People with the SW version 4.1.30 were not able to get their modules updated because the update did not include those modules. You would know if you were one of these customers because if the update did not work, you still got the error occurred message as well as the streaming audio playing fast.
The instructions were longer than most techs would take to read, so they would just jump thru them, when it came to doing the update, most would do it incorrectly and tell the customer that it was done only to have a PO'd customer when they picked up the vehicle. ("Dude, It does exactly what it did before I left it with you). The Techs needed to verify what module was in the vehicle against a supported group of listed modules before the update and then verify that the PN had been changed from the older PN to a new PN.
So the instructions were rewritten to make it a bit simpler.
So this update is NOT for those who have had it successfully performed but for those who are still having problems with the streaming audio and the "error occurred" message on their ipods.