This one has gotten me stumped. (I'm using an iPhone 4 on 4.3) Last night I was typing a text message and noticed that the recipient's name wasn't listed... hang on... none were listed! Except for my girlfriend's name under 'favourites'. (her name disappeared as well 5 minutes later). There were only 4 contacts left, 2 of which I had added within a couple of weeks ago. A new contact was there, myself complete with my profile picture from my girlfriend's macbook pro, and Apple Inc which i saw had popped into my contacts recently as well. So let's backtrack... About half an hour before I had logged into my girlfriend's macbook pro under my profile. I noticed in the Mac App store there was an update for some crappy game my girlfriend had installed, but when I went to update it told me it couldn't as it was for her apple id not mine. I sync my iPhone to another computer, a PC. Last backup I did was 8/20/11, so a while ago. I don't want to restore to that backup if it can be helped. I logged into web MobileMe and found that only the 4 same contacts were listed there as well. Screwed. I went to system preferences on the macbook and into Mail, Contacts, Calendars and my me.com account was listed there, but mentions only mail, calendars. It used to say Mail, contacts, calendars. I then went into MobileMe in system preferences and saw that contacts under sync options is definitely checked. So what's going on there? I also had a look at the address book and it lists the same 4 contacts. I have contacted MobileMe support and it has been escalated but nothing is going to happen until Wednesday Australian time. I can download a program called iPhone Backup Extractor so I can retrieve my contacts from an old backup, but I was hoping to tap into the collective knowledge of this place to see if I can get any suggestions/help. Any ideas anyone?