Hmm, I wrote a longish post yesderday explaining a bunch of different ways pixelization happens and how it is sometimes not your local providers fault but could be a problem upstream as most providers buy all their channel signals from multiple sources, not just one. ie, local weather is clear but the originating source feed in (wherever) is experiencing sleet or lightning near it's uplink dish.
This is exactly my thinking. We have the same thing with our cable. Even though you have cable, you have to remember that the cable company get its signal from the channel providers by satellite. So I guess you could still expect to have some of the same issues as satellite customers from time to time.
