iTunes 7.4.1 breaks a method of using AAC audio files as ringtones for the iPhone. The method, which involved altering the audio file’s extension, was posted on MacRumors.com last week. While the method no longer works as of iTunes 7.4.1, a workaround has been discovered. Apple has signed a patent-licensing agreement with cellular technology developer InterDigital that covers current and future generations of the iPhone, and points to a future…
