I'm having some odd issues with my set and Hockey. When the camera follows the players up and down the ice, it auto adjusts the brightness - I have triple checked my settings and made sure eco/energy saving/auto brightness settings are off.
The set I'm using is a Samsung PN51E550 - if anyone has a fix for this please let me know, it's bugging me. I'm currently using the "Standard" option which has the energy star logo next to it in the menu UI. I'm starting to think that the set forces auto brightness in this setting.