Are you working on JPG images by chance?

Since JPG files (as well as TIF and PSD) had a white balance value applied when the original file was rendered into that format (whether by your camera or via post-processing) you can no longer set an absolute white balance value. It was a mistake that the settings appeared for JPGs in Quick Develop of version 1.0, and they have since been removed in 1.1, and you will only see the relative adjustments of “Auto” and “Custom” (or leaving it “As Shot”).

The logic behind them was intended solely for Raw images.

Only with Raw images can you set an absolute white balance value because that file has not been processed yet. So, if you were processing Raw images you would see all the absolute settings.