In what may be a harbinger of nationwide problems, angry viewers continue to complain to Maryland Public Television that they’ve lost the station. The problem: Comcast moved MPT from its basic lineup of channels to the digital tier, The Washington Post reports. “We’ve had quite a few calls,” station spokesman Michael Golden told the newspaper. “More than ‘many.’ ” The move affects tens of thousands of viewers in 10 Maryland and Virginia counties plus the District of Columbia. And there are more problems in Delaware.