We covered a bug that many of our readers tipped us on that saw the Twitter contact integration in Mango experiencing some difficulty. The problem being that individual contacts and groups were not displaying Twitter connectivity regardless to what settings/filters where chosen. While the Twitter feed is working, there's no way to view contacts who are also on Twitter.
A work around was available that saw users re-adding the Twitter account. The reason why this occurred was due to the social network modifying their API, which broke connectivity with Live. Joe Belfiore has confirmed, via Twitter, that the team has looked into the problem and the fix should reflect across the board within 24 hours. More details below from Microsoft Answers:
Get the Windows Central Newsletter
All the latest news, reviews, and guides for Windows and Xbox diehards.
Rich Edmonds was formerly a Senior Editor of PC hardware at Windows Central, covering everything related to PC components and NAS. He's been involved in technology for more than a decade and knows a thing or two about the magic inside a PC chassis. You can follow him on Twitter at @RichEdmonds.