Now you come to mention it, I do have a couple of odd things happening.
1) With my iPod Touch connected via USB, when I select Browse I am only getting [ABC] enabled for selecting Artist.. [DEF], [GHI] etc are ghosted out. Very strange.
2) Text message reading has simply stopped working. It worked on the first couple of days but now it doesn't. It is probably something I have done while playing around with settings on either the car or the phone, need to have another play.