Mac Mini, 2010, OS 10.8.2, 8GB ram, Photoshop 13.0.4 x64.
The Image/Adjustments/shadows/highlights controls are, quite suddenly, not working properly. When the control sliders are moved, nothing happens to the on-screen image until the "OK" button is actuated when any changes made to the sliders are suddenly visible. I have done all the usual things, including re-installing, but nothing helps.
Please, someone, help me get "shadows/highlights" back to normal functions.
Did you make sure that the "Preview" check box is selected? (bottom right of the pallet)
Aha! I looked right at the check box, knew what it meant, and it did not register. I really am showing my age, dammit.
I've banged my head on that one before, usually after many hours of no sleep cramming on a dealine. It's now the first thing I look for.