Clara's Dirty Little Secret - S1-E2
Audio problem: Season 1 Episode 2: "Clara's Dirty Little Secret". When Princess Clara and her Evil Stepmother make up, the latter thanks Clara before the scene switches to the Confession Room. When she says 'Thank you', her lips do not move.
Audio problem: During the booze party, Toots sucks up alcohol from a tube while the others chant "Suck". But when this word is chanted for the last time, the characters neither open their mouth nor do they move in rhythm to the chant, as they did before.
Answer: You might think it has something to do with licensing rights for the characters. But that's doubtful as several of the characters, both seen and unseen, are from the same animation company, Hanna-Barbera. Actually, it's a play on the real-life reality TV show convention of blurring/obstructing the faces of people who haven't legally consented to having their image shown, because their appearance on camera would put them in a compromising position. This happens often in shows like "The Real World, " "Cheaters, " and "COPS." In "Drawn Together, " Snagglepuss and Elmer Fudd, for example, were jokingly portrayed as not giving consent to their image on TV because it would out them as gay in the context of that episode. Of course, to the viewer, it's obvious who they are, and the humor lies in our memory of them as possessing a lot of stereotypically "gay" characteristics. Charlie Brown's face was obstructed by a leather BDSM mask, part of his "costume, " in a scene where Foxxy was his dominatrix. In the same scene, Natasha Fatale has Captain Hero in a similarly submissive role wearing a spiked collar and leash. Her eyes have a black bar across them, again, so as to "conceal" her identity, the way they do in the fashion magazines, even though we the audience know exactly who she is. The other characters you mention apparently "gave their consent" to their image being shown.
Michael Albert