All Contacts button doesn't work?

[dag16]

Hi,
so I searched on this, but haven't found anything.
When I press the All Contacts button, no matter which screen I'm on, it does nothing.
Anyone know how to fix this?

EDIT: I can't access any contacts at all unless I hit the talk button and go through my most recent dialed, and I can't add favorites or anything. It's like the whole contacts thing is hosed. Is there any way to reinstall the contacts section?
Thanks!