As promised last week, Apple delivered the first major upgrade of its mobile operating system, version 4.1 of iOS, and true to form, hackers found a way to jailbreak the software less than 24 hours following its official release. The major fun features of iOS 4.1 were revealed last week when Apple rolled out its latest line of iPods. Those features include the ability to automatically create high dynamic range photos. HDR is a technique for adding detail to images by melding multiple shots taken at different exposures.