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According to Star Magazine, the former rehabber "has been drinking, doing cocaine and causing all-around mayhem for the past few months."

Wow, really? From what we've seen, Lindsay's been going to work and hanging out with her girlfriend Samantha!

The mag also claims - via a LiLo "insider" - that Linds has "quit going to Alcoholics Anonymous and has absolutely never taken recovery seriously."

But Lindsay herself fights these allegations on her Myspace blog, calling Star's story "ridiculous," adding that "it's not like their track record is up there with the New York Times."

Burn! Meanwhile, LiLo has ALSO been squabbling with her father Michael who - in a long email to us - called his daughter's g/f Sam "dark, hideous and a disgusting representation of humanity!"

Damn - everyone's still accusing Lindsay of hanging with the wrong people and/or falling off the wagon! But is she, really?