I have a Logitech wireless keyboard and trackball. I just noticed that the media keys on the keyboard, and the extra buttons on the trackball weren't working. When I went into the Logitech preference pane it said that no Logitech devices were detected, and the little light on the receiver is off. Yet, the keyboard and trackball still retain their basic functionality despite the fact that they're apparently not connected to the computer at all.
Does anyone have any idea what's going on here?