Hey Kev.. I just installed my Avic F series unit and I'm having the same issue. I can voice dial by saying the numbers, but not by the contact names themselves. I use an Iphone 3G. I was wondering if I went to the 3gs if i'd have better luck but it seems you are having this issue as well. I also have the same issue when using VR to play a track. Artists, and playlists work fine but I can't pull up a track by VR. Have you had any luck?
T