Sorry if this is already out there...updated my iphone 3g to iOS4 everything is fine but I noticed when I get an incoming phone call the head unit rings like normal then after 1 or 2 rings switches to the ring tone I have on the iphone?? wierd because I am not sure I am getting a call or the song is playing Anyone else having this issue?

I noticed the same thing. The ringer I have set for friends now ring through my AVIC, even when the iPhone is set to silence.

Glad to hear I am not alone! Maybe someone out there can explain??