I had a lot of trouble connecting my iPod to my 2010 Mazda 3 after some OS 3.X update. Somehow they broke compatibility with some devices. Don't remember what revision it was, exactly. I reverted it back to an old-school revision and kept it there ever since. It is REALLY out of date now. Maybe they fixed things in OS 4.X, but I don't want to take the chance of making it incompatible again
Anyone else run into this issue?