Bleeding walls within the bathroom? I have notice this brown colored liquid on my walls and ceiling...

I have notice this brown colored liquid on my walls and ceiling in the bathroom. I am sure it is due to some time of moisture, but I don't totally take in what is going on or what the liquid is. It kinda looks approaching someone splattered coffee on my walls?? Does anyone know what I am talking around? Can you tell me what it is?
Answers:    I basically read an article in My American Painting Contractor magazine in the order of this very subject according to what I read this is cause by some of the chemicals leaching out of the paint. What they called it be surfactants. what happens is the moisture get on the walls when you shower or bath and sits here on the wall breaking down some of the resins in the paint cause them to run down the wall I don't remember which issue it was surrounded by but there network is
www.paintmag.com hear is another web site that might be helpfull
www.essortment.com/home/howtoremovesu_...
possibly your walls are dieing :]