NEW : Allegations `` extremely serious and must be investigated , '' Grigorieva spokesman says . Joe Eszterhas says Mel Gibson spews `` looney , rancid '' anti-Semitism . Gibson denies the allegations , said Eszterhas is upset over his script being rejected . Score: 6
NEW : Allegations `` extremely serious and must be investigated , '' Grigorieva spokesman says . Joe Eszterhas says Mel Gibson spews `` looney , rancid '' anti-Semitism . Gibson denies the allegations , said Eszterhas is upset over his script being rejected . Eszterhas says his son taped one of Gibson 's rants .