Audio problem: When they are trying to escape Koopa and the little caveman speaks, then Luigi answers him, he has the Princess' voice.
All Americans - November 6, 1962 - S2-E14
Audio problem: During the speech where Al tells Sam to quit (to force Chewie to play), Sam says he can't quit but his mouth doesn't move for a couple seconds after the words start playing.
Kotsuban uranai! Ranma wa nihonichi no oyomesan - S1-E14
Audio problem: In the English dub, Ranma manages to say perfectly "Coward! You take that back!" to P-Chan while he has his teeth gritted. (00:13:45)