I have an 07 XLE with the JBL system. I have had strange things periodically appear on the display screen, like a series of rectrangular blocks instead of the normal display, but shutting off the car and restarting it has always brought the screen back to normal. The dealer attributes this to bluetooth interference. Not sure I buy that, but at least they have it down on record if it continues.
Thanks for the input; I appreciate it!
Wow..that sucks about the display on your head unit -- I've never had that happen yet on my 08 SE, but I wouldn't let that go if it were me -- it would just bother me so much because I'm super-anal about my car...

I wouldn't worry about the dealer replacing the audio system. It should only take a few mintes and it's pretty hard to do any damage to the car during the process. If they scratch something it will just be their responsibility to replace it. If you are really concerned, I would take digital pictures of the area they will be working on with the date showing on the pictures. That way, if there is any damage, you have proof it was not there before they worked on it.
Thank you for making me feel a little better about this; yeah, my rep told me that it should only take a few minutes to do when I come back so we can wait for it; it's just that...the car is so NEW, you know? It's breaking my heart that something has to be replaced already...every time I look at the dash from that day on I am going to think "this is probably a refurbished unit and it's NOT the one that came from the factory..."
It's just dissapointing, especially since I needed a head unit replaced in my previous car, a '99 Accord V6 Coupe...