Whenever I turn on my Samsung LN32A450 LCD HDTV and watch for a while, the plastic housing of the TV will make this clicking/cracking sound occasionally. It sounds like it's due to the heat of the TV when it's on. Heat expands the plastic, so it makes this noise. It goes away after about an hour and will make the sound again when I turn the TV off. So, I was just wondering. Does anyone else experience this type of sound when watching their LCD TV? I don't recall my CRT ever making this sound occasionally (though I can't be 100% sure).