Apple may have gotten some very good news earlier in the form of it looking like Microsoft’s “I’m a PC” ads were created on Mac computers. Now, it has some bad news. Apple is recalling all iPhone 3G power adapters for units sold in the United States, Canada, Japan and Latin America (at least the countries that use American-style two prong plugs). Find the details here.

The reason for the recall is that there is a risk of electric shock if the adapter’s metal prongs break off in power outlets. Because of the shape of the adapter, this has occured in a “very small percentage” of adapters sold, according to Apple. No injuries have been reported.

You can order replacements here. Shipments of the new adapters won’t begin available until October 10. They will also be available for in-person exchanges in stores starting on October 10. Until then, Apple is advising that you charge your iPhone 3G through the USB computer hook-up.

This recall will effect millions of iPhone 3G buyers, as ReadWriteWeb notes. However, since the adapters are relatively cheap, it shouldn’t be a huge hit on Apple’s bottom line.