I just took my car in today at my local Infiniti dealership to handle the rough downshift between 4th and 3rd gear. Took the same information provided at:
http://www.imagedump.com/index.cgi?pick=get&tp=550499 and advised that they have not heard of this, however the TSB was able to help. Received a call 3 hours later and on my receipt its states the following:
Performed Bulletin 09-032 Reprogrammed TCM
Replace old part #31039-1XJ4A new part #31039-3RX0C
The ECU issue is totally seperate from the TSB for the TCM.
I drove my car back to work and the rough downshift is no longer there. Great info all!