Finally got time to go to my dealer this morning - was pretty much told, in a nice way, to !Removed! off. Their reaction was: 1) It was working fine before iOS 5, therefore the software in the car is fine, the software in the phone isn't (good point I suppose). 2) They could try to update, but it could make the problem worse, so they don't really want to risk it. 3) Wait until Apple realise that they have messed up and release an update to fix the issue. I'm not holding my breath. Sucks really.