Lindsay Lohan Floored

Lindsay Lohan FallsLindsay Lohan and gravity went at it again in Italy Monday night ... and once again gravity prevailed.

Lindsay has been living in London where she'll be starring in a play.  She was in Ischia, Italy Monday night at a film festival dinner when she took the tumble.

It's interesting ... Lindsay says she's in London because she has more anonymity.  Family and friends tell us ... they're worried Lindsay will fall off the wagon because she's becoming a fixture in the nightclub scene.