For the last couple of days I'm getting about a 1" horizontal stripe across the very top of the TV only on Ch 82. If the background color is blue, the stripe is green. If it's red, the stripe is purple. It can't be the TV because it's the same on my Panny plasma using a Sammy HD STB as well as my very new 70" Sony XBR2 using an HR10-250. Does anyone else have this problem or have any ideas as to what might be causing it?