This is only happening with ONE phone number, which happens to be in my Favorites. When I look on the Favorites screen, I see the name of my friend, and then I see it disappear until it only shows her phone number. Because I have MobileMe, it disappears from my Address Book as well on my MacBook. The rest of her contact information stays, including the other phone numbers, it's just the mobile number that disassociates itself from the contact card. Anyone experiencing something similar?