Apple's admitted that some of its iPod Nanos have been overheating, and is offering users replacements.
The company says that the problem is a faulty battery from one of its suppliers - it doesn't say which one.
It affects only first-generation models sold between September 2005 and December 2006. These, says the company, have a black or white plastic front and a silver metal back, while later models have a metal front and back.
While the devices are unlikely to catch fire, says Apple, the danger is increasing as the batteries age, and customers should stop using their devices now.
Users can order a replacement, here, quoting their iPod Nano serial number.
"You will receive a replacement unit approximately six weeks after we receive your current iPod nano (1st gen)," says the company.
"If you have a personalized iPod nano, you will receive a non-personalized replacement. Make sure to use iTunes to back up any data on your current iPod Nano before sending it in for a replacement unit."
You may, though, find yourself with something a little better than you had before. Apple hasn't been manufacturing this particular version of the Nano for several years, meaning that users will likely get a newer version back in the mail.
The recall's been a long time coming. More than a year ago, the company offered to replace the same devices in Japan after dozens of overheating incidents.