Default, 2.0.17
I'm still testing my forum before launching and this question involves personal messages.
Yesterday, I had 2 read messages in my Inbox and the message at the bottom of the forum index was: "You've got 2 messages.... Click here to view them." I deleted the messages entirely, refreshed the page and that message was gone. Good deal.
Today, I had 3 read PMs in my Inbox. The message at the bottom of the forum index was "You've got 3 messages.... Click here to view them." I created labels for each of them and then moved them. They moved successfully and disappeared from my Inbox, as I expected them to do. Yet, at the bottom of the forum index page, I still see "You've got 3 messages.... Click here to view them."
I cleared the cache and refreshed but I can't seem to make that go away. Do I literally have to delete messages for that to go away?