Factual error: When Princess Clara gives Wooldoor the shotgun, telling him that he has to shoot Live Action Cow, she racks the action, thus chambering a shell. Just before he 'shoots' the cow, Wooldoor racks the action again. This would eject the shell, but no such thing happens.
Other mistake: When Toot is in the attic and discovers The Legend of Xandir cheat book, the first code she uses is up, up, down, down, left, right, left, right, B, A, start. The only problem is the controller attached to the book is a Playstation controller. The Playstation controller doesn't have an A or B button but an X, Triangle, Circle, and Square button.
Tim and Xandir, Sitting in a Tree... - S2-E11
Continuity mistake: In 'Xandir and Tim, Sitting in a Tree', "Tim" gives Xandir a gun to shoot Captain Hero - it is a cartoon version of something like a .38 revolver. Xandir leaves the room and attacks Captain Hero/Tim with an automatic, something like a Colt .45. Completely different guns.
Tim and Xandir, Sitting in a Tree... - S2-E11
Continuity mistake: When an Entertainment Weekly magazine falls onto the table and Foxxy and Clara both hold it. If you look at Foxxy's hand you see that her furry bracelets suddenly disappear and then reappear.
Continuity mistake: In The lemon-AIDS Walk episode, after Captain Hero starts walking and killing everyone, he chops a telephone pole and it crushes and electrocutes people. Among those people was the announcer lady. She gets crushed and electrocuted, but minutes later, she is yelling at Captain hero, completely unharmed.
Answer: She was in the show 90210, so I'm guessing it's a reference to something she did in the show?