Angie flies as Brad gets boozy. 

The cracks are showing in the once-fiery romance of Brad Pitt and Angelina Jolie.
Brad looked buzzed on beer at a movie premiere after Angie badgered him about his boozing, sources say – and she’s escaping their problems by buzzing around in her own small plane.

"When they’re together, it’s a constant state of tension over everything from clashing parenting styles, conflicting ideas about where to set up their home base, and Brad’s flirty behavior with other women, plus his continued contact with Jennifer Aniston.

"Brad and Angie are dealing with the problems by keeping their distance from each other and blowing off steam with their favorite pastimes."

But a nasty spat exploded just hours before Brad left for Berlin on July 27 for Inglourious Basterds preem.

"Angie scolded Brad, saying that she didn’t want his solo visit to turn into an all-night beer bash," revealed the friend. "An insulted Brad shot back, ‘Buzz off!’ and huffed off on his trip."

The 45-year-old actor recently insisted: "I’m a dad now – my partying ends at 6 p.m." But the early curfew wasn’t in effect at a July 28 post-premiere party in Berlin,.

"Brad got his drink on because he needed to unwind," said the friend.

Meanwhile, 34-year-old Angelina has distracted herself by taking several flight lessons in her single-engine Cirrus, and on July 29 she flew to Las Vegas with adopted sons Maddox, 8, and Pax. 5.

"Brad and Angie are immersing themselves in their separate lives as a distraction from their problems," the friend said.