You are looking at two different "Process" versions-
A photo developed in the old process version (2010) will show the panel with Fill Light and Recovery sliders. (left of your screen-clip)
If you click on the 'Lightning Bolt" icon just below and on the right of the histogram panel, you can 'update' the image to the current process version (2012 Current)
Or make a 'process' selection in the Camera Calibration Panel- Process:....Drop-down menu.