I have a late '08 MBP hooked up to a new 27" ACD, using a bluetooth apple keyboard and magic mouse. It's been working fine in all respects until I woke it up today. Everything is fine except the volume. If I tap volume up or down on the keyboard, there's serious latency (5-10 seconds) between me pressing the button and it showing the volume moving. Secondly (and more importantly), there's no sound at all (no matter what volume it's set at). I've already directed the sound through the monitor's speakers (like I said, everything was working just fine). I've tried rebooting, double-checking the sound settings, and disconnecting/reconnecting the bluetooth keyboard. I'm not sure what else to do. Any ideas??