Allow me to explain some of the options:
1st: "The Angry Beavers", one of Nick's best shows, just disappeared from the channel.
5th: In the wake of Sept. 11th (I presume), Nick pulled an "Invader Zim" episode from air. All it did was mention the FBI...in a warning on a videotape.
6th: "Rocko's Modern Life" and "Aaaah! Real Monsters" returned to the networks in the 6am hour. To some, this is a minor quibble, but for fans of the show who treasure sleep just as much, if not more, this is awful.