Well I think I know where you’re going with this – using the CB to confirm your suspicion of focus drift. So I did exactly as you described, and using “acquisition” saw absolutely no change in focus numbers throughout, shooting all manual no PP, at 3 different focal lengths from same distance, turning camera off then on then starting over. So it may be worse than a nightmare – with a nightmare you wake up and it’s OK. This may mean another trip to Sony. As Craig and Jay said, in the end check it on a good monitor. Good luck!
http://www.kilby.tv
[edit] Forgot to mention the gamma setting stayed on “STD3” no matter what.