Apple recently launched a takeback program for faulty, third-party iPhone chargers, but should've looked inside its own glass house first. It has just issued an advisory that Apple-branded iPhone USB adapters sold between October 2009 and September 2012 could pose a safety risk by overheating. The affected model number "A1300" came with European versions of the iPhone 3Gs, 4 and 4s. The good news is that you can get it replaced free of charge with a redesigned adapter (A1400) at an Apple Store, authorized service provider or through Apple technical support. Apple has a full list of the affected countries (including most of Europe but not the UK), along with information about how to swap it at a dedicated support page. In case you've already purchased a third-party replacement adapter, Apple will also give you a full refund.
Update: Apple has told us that it voluntarily introduced the program, meaning it's not a recall per se. We've update the post's headline to reflect that, and Apple's full statement is below.
Apple has voluntarily introduced a program for customers to exchange the Apple 5W European USB Power Adapter which came with iPhone 3GS, iPhone 4 and iPhone 4S models through September 2012, because in rare cases the adapter may overheat and pose a safety risk. For full program details, visit http://www.apple.com/support/usbadapter-european/.