Hello, I have a freind who recently upgraded to the iPhone 4. Everything has been fine for her for about a week, but the last time she synced it with iTunes (On a Dell PC running Windows 7) it replaced her contacts with her brothers', who also uses the same computer. He brother has the same issues. I've had her restore the iphone from a backup from earlier, but that did not work, and she has the same issue. Any fixes? I tried to look in Mroogle, but I did not see any relivant results. Thank you for your time and have a great day!