Flickering in dark areas from Blu-Ray on PS3 displayed on Sony 46V2500

I have had my TV for over a month now, and have not noticed this until today. This is the first Blu-Ray movie I have watched, Planet Earth, sometimes during the movie I notice what looks more like flickering lines showing up mostly in dark area on the screen. It does not do it all the time, just mainly when really dark areas are displayed.

I am using a Phillips HDMI cable.

Any suggestions? Could it just be the movie?