I discover the ICS BT bug when I purchased a new Golf during the week. I couldn't for the life of me get the phone book available via the MFD or the BT Media to work via the head unit despite being able to pair the S2 with the in car BT. I discovered a fix to this by accident yesterday. I read up here and elsewhere regarding the issue and discovered that short of using a custom rom that the fix might be a factory reset. I figured it would be best to backup the Galaxy S2 via Kies and when I opened Kies I noticed there was an update, which I also completed. Low and behold the damn thing wouldn't run the backup properly and it appears ICS & Kies are also having issues! After much frustration I discovered the fix to this was to go to Settings> Applications> All> LogsProvider> Clear Data Voila fixed the backup issue. Thankfully I didn't do the factory reset this morning because when I jumped in the car the Phonebook was available via the MFD & Bluetooth Audio was also working. So before you go ahead and factory reset try this; hopefully it works for you too!