NEW YORK Mel Gibson says he has an "ethical problem" with Proposition 71 -- the 3 (b) billion dollar bond measure to fund human embryonic stem cell research. Gibson appeared on A-B-C's "Good Morning America" today and says that he shouldn't have to pay taxes to help fund the cloning of human embryos. Gibson is Catholic and he directed "The Passion of the Christ," the controversial movie which chronicles the last hours of the life of Jesus Christ. He says he was initially ecstatic when he first heard about Prop 71, but later changed his mind when he learned about...