Corrected entry: In the episode "No Chris Left Behind", Peter has three fights with the chicken. Just before the first fight the chicken tells Peter to pick up a coupon notice. In that one shot, you can see the chicken's head shows the man inside, but in any other scene with the chicken, his head is covered.
Corrected entry: "Brian Goes Back to College" - Season 4, Episode 18: If you look at the handicapped teacher in the wheelchair, you can see that the keyboard on his wheelchair's arm only has four rows of five buttons, making twenty in all - not enough for every letter of the alphabet.
Corrected entry: In the new season, in the episode where Lois goes to jail for shoplifting, the family is visiting Lois in jail where she is wearing orange prison garb. In the next scene where Peter is helping Lois escape, he puts Lois' head in his mouth with her body hanging outside it. She is now wearing her normal uniform of green top and beige pants. Yes, its a cartoon, but she should still be wearing the orange.
Corrected entry: During the opening theme you can see in the background when Lois and Peter are singing on the piano that there is a stereo and three pictures of Stewie, Meg and Chris in the background. However, during episodes the piano is in one room and the stereo and pictures are in the room where they watch TV by the staircase.