Facebook lets you kevery time you make a new friend on the social network, but it doesnt tell you when you lose one. The new Facebook Timeline feature lets you figure that out. Update: Facebook has disabled this new feature, which was clearly not supposed to be there. Its been fixed now, a Facebook spokesperson said in a statement. The original article is below. Currently, Facebook does not notify you when someone unfriends you on the social network. That may soon change with the upcoming Facebook Timeline feature, which will be replacing your current Facebook profile. Unless Facebook changes this, you can actually see who has unfriended you during any point in time youve been on the social network. ZDN