Mel Gibson, who has become more and more off the wall in the last few years, is facing another shot at bachelorhood. His wife of 28 year, Robyn, has filed for divorce in California, citing "irreconcilable differences." The two married in 1980 and have seven children; only one is still a minor. TMZ.com reports that a showdown over Gibson's wealth—estimated at $900 million—looms on the horizon, as Robyn is entitled to 50 percent of the couple's earnings under state law. Rumors has it tensions escalated between the two after Gibson's embarrassing drunk driving arrest, when the star went on an anti-Semitic tirade.