I just downloaded and installed iTunes 9.1, and when I went to syncing my iPhone, it brought up that confirmation window saying it was Adding/Deleting/Modifying a certain number of contacts. It had 31 contacts (out of the 31 I have) under the "Modify" portion. Any reason why it would modify all my contacts? I canceled the sync just in case, but is it safe for me to go through with the sync?