I saw that on ABC... quite a few commercials--Capitol One, Allstate, Dr. Pepper, AT&T, Verizon--had no voice-over track. All the sound effects, backgrounds, and incidental music was there, but no primary voices. I'm guessing that means some kind of mixing error at WZZM with commercials that are designed to go out as HD, and I'm seeing them in the analog over-the-air version.

My guess anyway. Mixing error of some kind, certainly.