Hi to both of you, I'll try that firmware update as soon as possible.
In fact Grady,the mirror got stuck when i was at the races and was using CH mode with 5 fps.Later when it was working again,i reduced it to 3fps,nevertheless it was blocked again! I do think that it's precisely the film rate is the culprit,cause it was fine today at an engagement ceremony.
And you can see now that my geographical location can be a serious matter too.We're here in the tropics,but as fas as servicing of equipment is concerned,we're far from being lucky!
Leaving you now.Hope to come back to you with better news. Your NIkonian friend Ned