Is that 3800 DVR one of the new "Cable Card" boxes from SA? If it is, have you tried just putting in a non-CC box?
Better yet ....take that 3250 out of the van and hook it up in place of that DVR and see if the problem goes away.
Also ..... take that DVR out to the truck and hook it up there. If you got micro-tiling in the truck with the DVR, then you found your culprit.
Re: The resolved Micro Tiling
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