This is a follow up on my September 28, 2012 post. I received my camera back from Nikon Canada last week. The lock-up problem was not resolved. They commented on the repair form returned with the camera that it had been cleaned and checked, adding as a note "Multiselector Button was in lock position". No other information was provided. I am wondering how they think this could be related to menu and playback lock-up. The Multi Selector does not have a lock position - the control surrounding the Multi Selector is the Focus Selector Lock and its position has no effect on the menu and playback controls. Lock-up has occurred with this control in both the locked and unlocked positions. Also, switching it on and of during lock-up has no effect. The camera goes back to Nikon next week with a much more detailed description of the problem including the conditions under which lock-up occurs, how the controls behave during lock-up and the actions I have tried (both successful and unsuccessful) to clear a lock-up. Is anybody else experiencing this problem? Any advise would be most welcome.