In the last few months this has gotten worse with spammers.
At this site today a user called wilsondavid
Posted some spam in the general chat area.
Someone deleted that person.
I assume!

So I visit today and see I have unread posts in that forum.
I see several topics that have indication I have not read them meaning in bold.
I visit one, no new post.
Again on another post.
Finally I look up the user in the database and he does not exist.

So now as a user what do I do.
If I elect mark all as read I miss new posts by others.

I noticed if I elect active topics in the tool bar they do not appear.

Blue Man Group
There is no such thing as stupid questions. Just stupid answers