resetting Blackbery screen

[TechnoIdiot]

I have a Curve - the main window shows summaries of messages and when you roll over Yahoo or Gmail or whatever, it tells you how many unread messages you have.  I've had it about a month now, and it's currently showing that I have one unread message in my yahoo account and one in my second email account, however, I have read all messages.  The little envelope icon at the top that summarizes ALL unread messages says I have 6 of them. I don't.  Is there a way to reset all that so it's right?