June 06, 2006
"Apple Computers, Inc. told MacBook owners with too-hot-to-handle notebooks that they should check the back of their computer for a piece of plastic which should have been removed at the factory... Symptoms of vent-blocked MacBooks include a constantly-running fan and heat coming off the top or bottom of the computer..."
"...Some MacBooks may have left the factory with a thin piece of clear plastic covering the rear vent. This is used in the factory to prevent dust from getting into your computer. If your MacBook has the plastic still over the vent, simply remove and discard it..."