User blog comment:Kirkburn/Technical Update: August 24, 2015/@comment-1038387-20150824202244

Already reported it via Contact/bug, but just mentioning it here to see if others got it too:

Message wall threads were, when one user replied, "spun off" into a separate thread, with the replied-to post now as the OP. In Recent Changes, only the response appeared - and it had no title. The thread number is different, but the post sequence number (Thread:99999#7) was continued from the original. The replies were not visible in the original thread.