"Please note that all channels listed may not actually carry HD programming, but are capable of doing so. These situations will show either 0% for the HD% or have a blank HD%. This is often the case with the 'Local Broadcast' listings."
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I think they list a lot of standard-def over-the-air DTV stations as HighDef.
"Please note that all channels listed may not actually carry HD programming, but are capable of doing so. These situations will show either 0% for the HD% or have a blank HD%. This is often the case with the 'Local Broadcast' listings."