Brightness slider gone in display preferences

I have a 24" LED Cinema Display and can no longer control the brightness settings in OSX

I believe when I applied the recent java/bluetooth updates the slider disappeared upon reboot. I did some searching and can't come up with a way to get it back.

I'm using a 15" Unibody MBP, and the brightness slider for that screen is available and does work. I also tried setting the keyboard shortcuts on my main keyboard (external) to turn up/down the brightness but they won't function at all.

I have tried zapping the PRAM, repairing permissions, and disconnecting/reconnecting the display, as well as booting with no external display and nothing has made the slider reappear. I also logged-in as a different user and the slider is not there for the Cinema on that profile either.

I really, really hope I don't have to reinstall OSX to get rid of this but I'm out of ideas. I would love some help/ideas if you've got them. The worst of it is that I turned down the brightness to less than half (when it worked) becuase I had a headache and now it's stuck there!

I'm really beginning to wish Apple would have included some manual buttons on the darn thing...

Thanks.

 

Yeah it's the primary display. I don't have an apple keyboard but I set the shortcut keys in system preferences to turn the brightness up/down on the display and they don't work. I'm thoroughly stumped.