Depends what you mean there!
Three things come to mind - The New Posts Widget in the WP footer? Or the Recent Post List within the forum itself? Or the stats section?
I can't think of any scenarios where the recent posts widget would stop displaying..
The Recent Post List within the forum is set to not display for admins. This can be changed using the 'admin' argument. We can walk you through changing that if it's what were talking about.
If you're using Reboot theme the stats section has an open / close control in the footer, it's the little graph / graph with x button next to the RSS button. It remembers your choice, so if you close it, it remains closed even on new pages / refreshes until you open it again.
You can remove the button if you like so that it always shows - Let us know if you want to do that and we can walk you through the process.