I currently have two HR20/700 units and at random time throughout the day the ESPN HD channels pixelate in blocks but the audio usually is unaffected. Sometimes it gets quite severe and i lose 5-10 seconds before it catches up. On a static images its ok, but the more action the more the break up. This has been happening for a month I assumed its hardware so i call to get an upgrade and the CSR told me its a known issue with the transmission and new hardware won't help. Anyone else have this problem?