You'd be surprised how common such problems are industrywide. Wiring defects, power supply problems, heat dissipation issues, batteries going "boom"....
Sometimes it's a small quantity of product that are faulty, sometimes it's just normal statistical failures, and sometimes it's a big deal.
A recall of 14 million units is HUGE. Be sure much investigation took place before this decision was made. The CPSC does not take such issues lightly, nor do the companies involved.