Major wood pallet fires?
Of course, if you compare number of pallet fires to number of residential fires, the above almost seems like nothing. There were 20 major pallet fires between 2008 and 2010. There were 403,000 residential structure fires, causing an estimated $8.6 billion in damage - in 2008 alone.
While I'm sure the pallet fires caused plenty of problems, it's always good to put things in perspective.
Update: As Douglas points out, the site reeks of plastic pallet propaganda. Another case of forcing an issue by exaggerating the numbers. Tsk.