[Barranca]

Lynn, this might not apply to your situation.....but,,,,, I had trouble with OK & Cancel keys for several days/ reboots. I got lucky, I don't know 'how' it happened, but one day an apple osx window popped up. Now mind you I did nothing different that I hadn't done a MILLION times previous, but the osx window popped up, the one where you have to go into System PREFs and implicitly check the box that you want to give avid control permission to make changes/control osx....darn the name slips my mind...once I checked the box and rebooted BOOM OK and cancel started working..sorry I'm not in front of my computer. I will try and remember to look and update back here. Again sorry if you already tried this.....(I think it is called 'Accessibility'

Alec