Apple has issued a recall for iPhone 3G USB Adapters sold in the following areas:
USA
Canada
Japan
Mexico
Several Latin American Countries
The fault with the power adapter relates to the actual prongs that plug into the power socket actually detaching from the charger itself and causing injury to people. Although this has only been reported by a small percentage of customers Apple has stated it takes customer safety seriously and as such will be exchanging the adapters for a redesigned adapter.