After fours years as a member of Guns N' Roses, during which time the band canceled more shows than it played and released no original material, guitarist Buckethead has had enough. The eccentric musician, who wears a fried-chicken bucket on his noggin and talks only through a hand puppet, has walked out before but has always returned to the fold. This time, however, it looks permanent. At the end of last year, Buckethead became fed up with Guns' inability to complete an album or tour and stopped working with them, his manager said. Buckethead appeared on the green carpet at...