I hope someone can help.

We (my office)are trying to find out why some of our announcements are
not rolling off after the expiration dates.

In some instances, we figured (at least, I think) it could be because
they're linked to workspaces. In other instances however we have
announcements that were set up as far back as January 15, 2008 that
have not expired or rolled off. They have up not updated or modified
and we can't get them to go away.