An article from Technoblog by Devin Coldewey
Social media sites have always allowed you to pass updates from one site to another. Your tweet can show up on your Facebook stream and so forth. However, LinkedIn announced on Friday that your tweets on Twitter will no longer appear on your LinkedIn stream. This is because of “Twitters evolving platform efforts.”
Twitter is adding new features and apps, and some of these would not transfer to the other sites correctly. Users can still post to both Twitter and LinkedIn though. It just has to originate from LinkedIn and be sent to Twitter, not the other way around.