Facebook is working to clean up the mess after it decided to hide e-mail addresses besides its own @facebook.com e-mail from users’ profiles. The switch happened last week, and those who sync their contacts with Facebook soon found that all their friends’ e-mail addresses were missing — only to be replaced by @facebook.com addresses.
There is a quick fix to reverse this change for your Timeline.
Fix is on the Way
Facebook says it is now working to fix the issue that resulted in the e-mail syncing anomalies. It appears contact synchronization with Facebook is performed through an API, which Facebook says it is pulling the primary e-mail address associated with an account — but for certain devices (including older Android phones and those running iOS 6 beta with Facebook integration), only the last e-mail address added to the account was being pulled, in this case the @facebook.com address.
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