In the first showing of the episode where Doug celebrates "Chinese New Year Day" the ending shows one of the terrorist rabbits watching WWF wrestling. But the second and third showings have the rabbit watching monster truck racing.
In the episode Safari Day (1), they originally had the segment "Kids Want Porn" with 4 - 6 year olds, yelling they want porn. Later repeats of this episode had the kids segment removed and was changed to "Porn for everyone."