Sharp 66FW-53H. Brightness Flickering !

I purchased a Sharp 66FW-53H 28" Widescreen TV. But when the TV or video is showing a scene set in a low light situation. The TV seems to have trouble controlling the brightness of the picure. You get this effect that looks like someone sliding the brigtness control up and down in a attemt to find the best picture !
It's very annoying. It looks alittle like the macrovision effect, only not as bad.
I have a engineer coming out sometime soon ? But I would just like to hear if anyone else has had this problem, and if they managed to fix it ?

Thanks.

I also have the same problem on the 32 inch version of this TV, and it is indeed very annoying! If you're still reading this boards, have you managed to fix it, or has anybody else had any experience with this problem?

thanks alot

Pudding