I just installed 10.1 yesterday and when i went to run Display Calibrator it just skipped over the "set up" and "native gamma" options. I tried having Expert mode selected and not selected and the same thing happened.
Same thing happens to me on my iBook.
Only difference between expert and easy mode is that I get sliders when choosing target gamma and target white point.
If I, however, connect the iBook to a television I can set native gamma.
Everythings is as it should be on my B&W G3, though.
Could it be an issue with PowerBooks/iBooks? Anybody?