I switched last week and one of the first things I did was put all my contacts into the Address Book. I also spent time inputting postal addresses and phone numbers as well as emails. I then synced it up with my .mac account. A few days ago (I wasnt connected to the net). I loaded up Address Book and it just Apple Computer and My Name entries on it, nothing else was there. I tried replacing the old address book application data but it didnt work. I looked in safari on my .mac address book and all my contacts (about 200) were on there. I then synced my .mac and address book and now both address book and .mac account only have 2 contacts. Anyway I can get this data back, I didnt have a back up apart from what was on my .mac account. Do I have to re-input all the data? How do I make sure it wont randomly wipe the newly inputted data again?