I had assigned function keys 1-10 to Toggle certain Studio Panels, ie Brushes, Swatches, etc. Suddenly, the only function keys that will do anything other than beep at me are the OS assignments for 12-16. I thought it was an OS problem until I checked my old copy of Photoshop. Function keys work there! I've restarted my Mac, several times. I've Loaded a Saved copy of Preferences from when the keys were working. I've trashed the beta 6. Downloaded it again and reinstalled. No joy! Just beeps. Other shortcuts keys besides the function keys all work as expected. I'm stumped! Any suggestions? Please?