
While some have presumed Gibson's rant was alcohol-fueled -- sources close to Mel tell TMZ he hasn't had a drop since his infamous DUI arrest. Y'know ...THAT one ... which happened four years ago tomorrow, by the way.
People in Oksana's camp say she acknowledged Gibson's sobriety during child custody mediation -- but she also wanted to make sure Mel didn't go off the wagon during visitation with Lucia.
Our Mel sources say booze is a non-issue for him these days.