User blog:Pebolim/"Nerds of a Feather" Error (iTunes)

I recently bought "Nerds of a Feather" in iTunes (in HD) and I experienced a mid-video error. The quality degrades drastically during one or two seconds. The error is at 2:22 - 2:27, when R.I.C.K. is explaining how Roger waves (side-to-side). So, anyone who bought it experienced this before? It's just me, or the iTunes version has this problem? I took two pics, here (zoom the image to see better):