Facebook Beta picks up an update to improve News Feed
Version 184.108.40.206 is live in the Store
Facebook Beta gets an update improving the News Feed stories and fixing many bugs from previous releases. Version 220.127.116.11 fixes issues with Recent Stories, user-created stories, and eliminates duplicate content.
The latest version of Facebook Beta for Windows Phone also repairs the reappearing of the same stories at the top, and leads to more stable News Feed.
Facebook Beta received many small updates over the past few weeks and this is probably the last version for this year. You can update the app from here.