Lindsay Lohan Hawaiian Vacation -- Approved By Probation Dept.

Probation is a beach for Lindsay Lohan ... who's currently sunning herself in Hawaii -- but only because her new probation officer signed off on the tropical vacation.

Lohan IS allowed to travel under the terms of her probation, but she's not allowed to go anywhere without running the idea by her P.O. first -- and this time, LiLo played by the rules.

Sources close to Lohan tell us ... the probation officer was impressed by the fact Lohan is way ahead of schedule in her court-ordered stint in morgue duty and psychotherapy sessions ... and found no reason to reject the trip.

We're told Lohan wanted to get out of town to escape the spotlight for a few days ... to prepare herself for the P.R. madness that will surround the release of her Playboy spread.

Posted in: hollywood,Lindsay Lohan