In one case, a consumer actually experienced a “small burn”, and in another a pillow was slightly damaged. The pillow damage is actually something to be really concerned about, as if it had actually caught fire it could have caused a serious fire and/or injury.
The faulty chargers have micro-USB connectors and bear the model number MU15-N1052-A00S. The CPSC suggests contacting Google about a replacement part, which you can do at (866) 628-1371 or online at Google’s chromebook website.
Google had previously advised that in the interim users could charge their HP Chromebook 11s with any “Underwriters Laboratories-listed micro-USB charger”. The recall affects about 145,000 units.