I just completed a call to HP Tech Support regarding this problem - foul odor coming from machine after printing with Laserjet 1006 - particularly after printing a long document. The answer I received was that the toner fuser produces sufficient heat to generate this foul odor in an unventilated work area. The machine is considered "unventilated" - there is no fan inside to move the odors away from the machine. I moved my machine about 5 feet away from where I sit and turned the vents to face the wall rather than me directly. This seems to be working at least for now.