I have strange green pixelation and audio dropouts on my local NBC station off and on. It seems to occur at random, sometimes every few days...sometimes weeks between occurrences. Does anyone else have a problem with this? It most recently occurred a few minutes while I was watching The Voice on NBC. I know it's not a weather issue, clouds, rain, etc., as it hasn't rained here for weeks in south Alabama. It doesn't occur on any other channel, so I'm wondering if it's just my local station.