Here is a notice from the Consumer Products Safety Commission:
This recall involves three-prong AC wall plug adapters included in the Apple World Travel Adapter Kit sold before February 2015. The kits contain three-prong and two-prong AC wall plug adapters that fit different electrical outlets worldwide. The recalled adapters were made for use primarily in the United Kingdom, Singapore, and Hong Kong and were also sold with Mac computers and iOS devices. The recalled three-prong AC wall plug adapters are white with no letters on the inside slot where it attaches to an Apple power adapter. Redesigned adapters are white with gray on the inside portion that attaches to the power adapter.
Consumers should immediately stop using the recalled wall plug adapters and contact Apple for free replacement adapters.
Apple has received six reports from other countries of wall plug adapters breaking and consumers receiving shocks, including two reports of consumers who were medically evaluated and released without need for further medical treatment. No reports of incidents or injuries were reported by U.S. consumers.
Apple stores and other home electronics stores nationwide, and online at Apple.com from January 2003 through January 2015 for about $30.
Apple Inc., of Cupertino, Calif.
You don’t see recalls of Apple products often…so I thought this was noteworthy…especially given that there are about 814,000 of these units.
Consumer Contact: Apple at 800-275-2273 anytime, or online at http://www.apple.com, click on Support and then click on Apple Three-Prong AC Wall Plug Adapter Recall Program at the bottom of the page.