"Doctor, it hurts when I do this"
"Don't do that."
Just like our phones and PCs not all settings work well. Go with what works. I'm sure that for some setup that setting is OK, but for this condition, no.
I have noticed today that this TV has a slight flicker when HD size is set to 2. The top small black bar going across has been the one that is flickering. It never did this before so is this an issue with my cable or the TV?