The new PM system organises things in 'topics', so replies to PMs stay in the same topic and effectively create a thread. It looks like it's a much better way of organising them. You can also, if you wish, bring a few extra people in on the thread.Old PMs have been transferred, but each old PM (including sent ones) has been placed in a separate topic. There is a limit, which I think counts topics rather than messages. That limit has now been reduced to 500, and some people are over it and therefore cannot receive new PMs. Could I ask you to go through your old PMs and delete those no longer required?