I hadn't noticed until a few days ago, but my 'stored messages' which numbered a couple hundred, have been reduced to twenty-two. One page worth.
I'm guessing the recent upgrade affected the message functions as well as the other disruptions.
I've also noticed that read posts are no longer flagged as read unless I leave the forum. Until then, they are still red-flagged as 'new post' even if I have read them.