What is the daily limit for Ibuprofen?

I'm trying to find out if there is a recommended dosage limit per 24 hours for Ibuprofen as there is for Tylenol, to lessen the possibility of hepatic compromise.

Has anyone heard of one? If a person takes 800-1000mg of Ibuprofen per day, pretty routinely, is s/he at risk for liver injury or failure?