I am having the same symptoms pairing my 8320 with my Acura Handsfree Unit. I havbe had 3 other older BBs that worked just fine but the 8320 doesn't. It asks for the passcode and never connects.
I just loaded the new OS .180 and was hopeful as the very first time I tried to pair the code was accepted but the BB was never able to connect. Unfortunately I deleted the entry and tried to pair agaion and I'm back to the original behavior. This sucks.