'Mrs. Doubtfire' House -- Hit By Arsonist

Oh dear ... someone tried to burn down the San Francisco home made famous in "Mrs. Doubtfire."

It happened at 8:00 PM Monday. The owner of the home, a doctor, believes the culprit is a disgruntled former patient.

As for how the fire started ... fire officials say the arsonist doused the doormat with gasoline or some other type of flammable liquid.

The damage wasn't serious -- the owner was able to contain it before it got out of control.

Just a few months ago, the iconic house served as a memorial site after the death of Robin Williams.