Lindsay Lohan -- Purse Stolen in Hawaii

LIndsay Lohan's Hawaii vacation just got a whole lot more stressful -- TMZ has learned, she got her purse stolen last night ... containing everything from her passport to tons of cash.

Sources tell TMZ, Linds had been at a house party in Laie, Hawaii for about two hours -- NOT drinking -- and accidentally left her $5,000 Chanel purse in the car. When she came out, the purse was gone.

According to sources, the purse contained her passport (and other ID), her probation paperwork -- giving her permission to take the trip -- and lots of cold hard cash ... good idea.

But it gets crazier -- Lindsay is due back in California court on Wednesday for a hearing about her probation. It's extremely unlikely, but if she misses her court date, the judge could find her in contempt and revoke her probation, landing her in the pokey.

If it all sounds familiar -- it's because the same exact thing happened to Lindsay last year while she was in Cannes ... 'Memba that?

Kahuku Police are currently investigating the situation.