HOW TO: Use the New Facebook to See Who Has Unfriended You

In addition to showing users a timeline of their activity on the site throughout the years, it turns out that Facebook's new Timeline profile provides a rundown of which friends they've lost.

Here's how you can see which friends you've lost:

1. Enable the new Facebook timeline.

2. Pick a year in the timeline and locate the "Friends" box.

3. Click on "Made X New Friends."

4. Scroll through the list. Where you see an "Add Friend" box, you know that you are no longer friends with that person. If you haven't unfriended them, they've unfriended you.

There's still no real-time Facebook alert for an unfriend. But if you're really interested in learning more and more quickly about your declining online popularity, a browser plugin like Better Facebook is a good alternative.

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UPDATE: Facebook has disabled this "bug."