Hi Al, they show which posts are new, have new content or not changed since you were last on and information like that.
I did find the spot in vBulletin that shows that, I will see if I can find it again.
I don't mind if other members disagree with my comments.
I don't profess to know everything, and I may learn something new.
"Never attribute to malice that which is adequately explained by stupidity."