Someone over on utalk posted that they had AT&T swap out the DVR with one of the newer, larger ones and this went away. It only seems to affect some TVs. My Panasonic TVs were connected via component and I never saw this once.
Yes, this is a known problem. If your TV will accept a 720p signal, you can change the STB to output 720p and this usually solves the problem (Cisco STB/1080i/some TVs).
reply to sner66 I agree what was said earier.... why downgrade my viewing ability that what I pay for, due to know issues with STB hardware. I guess I was hoping that this may have been solved by the latest upgrade.