Previously when sending an announcement via the API, one was supposed to use <br /> to create line breaks. Now it seems that Yammer is dropping <br /> tags from posts and expecting <p></p> instead. Not only is this poor semantics (in some contexts) it is also a non-notified change which now renders all old posts created with <br /> as flat text messes. Is this a bug, or has the Yammer team pushed this change intentionally? If so, where is the documentation/notification of this?