Screen flickering on new samsung

[yoyo]

Just bought a new tv and its a Samsung LE32R7 LCD.. and have noticed the following , when you are watching a really dark scene the tv screen seems to flicker a lot .
Is this normal ?
It goes away if I put the tv in to the highest energy saving mode but then makes the tv look dull.
Faulty ??

 

[yoyo]

Ok I just done this and will have a nose later and see if it is still flickering .
thanks for that
on that page dont suppose you know what the gamma one is meant to be set at as I think I just altered that by accident .

 

[yoyo]

That has made the picture rock solid, thanks for the help with that, I was thinking of returning the tv but no need to now.