We hade a bunch of spam on the site overnight. I deleted all of it but you will likely see that there are a bunch of unread items. To clear them go to "Actions" and select "Mark All Read" which the icon looks like a envelope/document with a checkmark though it. The you can scroll to the bottom of the main forum page and you will see the listing of latest posts with the newest on the top. Read through them until you get to one you know you have already read the latest post and you should be all caught up!