The screen on my Nikon D5100 flickers. This is not due to the highlights which have been turned off. The menu and information screens flickers as well... I also noticed that, when displaying pictures: the focus square (from live-view) stays weirdly overlaid on the screen (this does not appear in the real files). Both times it happened was after shooting in live view with A mode. It went away after leaving the camera turned off for a while. It seems that the firmwares are up to date (A 1.02, B 1.01). Do you know where it could come from ?