To repeat, **PLEASE** read the post out of which the question arose.
On WBAL-DT in Baltimore, West Wing and ER come out approx. 2.35:1 (more precisely 64:27, or 2.37037037), because the station upconverts and stretches the letterboxed 4:3 feed to "fill" the 16:9 DTV image. It's ridiculous, but that's the way it is for now.
So the question is, can a 16:9 monitor correct this this corruption, or are WBAL-DT viewers (and others with similarly lame affiliates) SOL?
And if I understand your answer, it depends on whether the WBAL-DT feed is 1080i or 480p widescreen? So a corrupted feed like this might be correctable on FOX but not on NBC?