Do you use an HDMI cable? when we were having ours installed the guy said that on some of the cable boxes that the HDMI cables don't work well and you have to use Component cables(red, blue, green) instead, it happened on the one in my room where it got pixelated, but we just got a new HDTV in our family room and it is going just fine with the HDMI cable. So some work and some don't
OCNBLUE - I also have the same issue as you...I have 2HD/2SD but am on the 19.2mbs profile. I've tried to explain to Tech Support that I should be on the 25mbs profile but they don't seem to get it.
On my low profile I can get by watching 2HD and 1SD but when I try to do 2HD and 2SD I get extreme pixilation on one of the HD streams.
I've heard from others that your max sync rate needs to be >30mbs to get the 25mbs profile. My max is right at the cutoff 29.9mbs.
Have you gotten Att to up you to the 25mbs profile??