lohanteeth102011_08_230.jpgAfter being turned away at the LA County Morgue yesterday when she arrived 45 minutes late for community service, Lindsay Lohan made sure she was on-time today and turned up a hour EARLY at the coroner's office.

An X17 photographer in the scene tells us: "Lindsay arrived so early, she was sure to be on time. There's not that much traffic at 6:30 so she breezed into downtown from Venice and arrived an hour early."

Lindsay is expected to begin orientation at 7:45 this morning.

Lohan had her probation revoked by judge Stephanie Soutner Wednesday and left the courtroom in handcuffs. She posted the $100,000-bail and is still required to work two eight-hour shifts a week until her probation revocation hearing November 2.