HFA, thanks for the captures.
But these have me wondering if I was hallucinating? When this first started airing, I caught a bit by chance, and it was 4x3. I was surprised, so I checked the website to confirm the "True HD" tag, and set up a recording anyway.
When I did a quick check afterwards, I would have sworn it was 4x3. I didn't bother to check if it was actually HD, or an upconvert. This would have been the airing just before your 6:15am airing yesterday, which would have been ~the 8th or 9th. I know, because my info for that version indicated 3 more airings in this cycle, and now there are just 2 left.
I'll have to go back and pull my tape to check this, because it's peaked my curiosity.