I've noticed some slight shadows across the bottom of the display. They are alternating with normal brightness so it reminds me of what somebody posted the other day of alternating vertical beams of light. Theirs was terrible while mine is very subtle. Are these the result of the LEDs? Does anybody else have them? I thought I had a perfect display...but then I started noticing this. I feel it's become more noticeable, but am not sure. Not looking for faults, just wondering. cheers!