I have one problem with Phineas and Ferb, a show I otherwise enjoy. The sister is a classic Disney tween show girl. It sets an awful example for my daughter as she relates to her brother and other peers - the boys are doing all this great, awesome, fun stuff while the girl tattles on them and cares only of boys and popularity.
The other female characters (Isabella, Vanessa, et. al) are strong enough that I can forgive the broad clumsy parody that is Candace.