When Bucky's pants are torn, they go to the junkyard. Doris shows up, but when the Cosby Kids try and hide Bucky's pants, you can clearly see that his pants are fine.
Fat Albert's shirt was clearly fading before the scene where he's hanging outside the window trying to get Lauri's attention. However, when he's at the window, his shirt is bright red again. It returns to being faded when he lands on the garbage bags.
When Fat Albert and Reggie are about to fight at the party, Lauri is seen leaving the party twice.
When Reggie starts to take his clothes off at the race, there is a big tree in the background but in the next shot the tree is gone.
When Fat Albert meets Bill Cosby, you see Fat Albert raise his right hand to shake Cosby's in a shot viewed from behind Fat Albert. The next shot shows a view from Fat Albert's front, and he once again raises his hand to shake, even though he never put it down.
Cable stations such as TVLand do not interrupt their broadcasts for special news reports.
When the guys are in the junkyard looking to build some "wheels" to take the girls to the party, the train that rolls by is a Los Angeles Metropolitan Transit Metrolink.
When Albert challenges Reggie to a race during track practice, palm trees are clearly visible in the background foliage. Palm trees do not grow in Philadelphia.
Fat Albert and the Cosby Kids (1972) is presented as crucial to North Philly pop culture, yet only 3 or 5 people notice that the overly conspicuous band of newcomers look like live versions of the popular cartoon characters.