The new Bluetooth System Preferences in Leopard are much more useful for showing the status of favorites and connecting them easily, particularly when re-pairing devices that are used with multiple computers. However, if you connect two keyboards at once (USB or Bluetooth), there's a problem with re-pairing the Apple Wireless Keyboard when you try to connect via the Actions (gear icon) drop-down menu: Bluetooth Prefs should generate a passkey, but doesn't always do it. It turns out that the prompt to manually enter a passkey is actually active but not visible. Make sure your keyboard is on and discoverable (blinking green light), and type an easily remembered passkey (1234) and hit Enter. Then the prompt to match the passkey will pop up. Enter this on the other keyboard and hit Enter. The keyboard will then connect.

	Read more at MacOsxHints
	feeds.macosxhints.com/~r/macosxhints/recent/~3/196684614/article.php