More danger from mercury bulbs (CFLs)

AP via WTOP:

A Cumberland family has lost their home to a fire caused by using a compact fluorescent light bulb in a lamp controlled by a dimmer switch.

The state fire marshal’s office says such fires are rare, but they’re a real danger that people should consider when replacing incandescent bulbs with the more efficient fluorescent type.

[…]

Truck driver Rick Jenkins says he didn’t think to read the label before screwing in the bulb. The fire caused 165,000 dollars worth of damage to his home.

I wonder what happen to all the mercury in the bulb.