3.3.1 -- Applications may only use Documented APIs in the manner prescribed by Apple and must not use or call any private APIs. [emphasis added to highlight new text]
With this change, Apple has amended its agreement so that software approved for the App Store has to be written in one of a select few, Apple-approved programming languages, all of which are supported by its Xcode developer tools.
That seems to put the forthcoming Adobe Flash CS5 square in the crosshairs. Flash CS5's promised that developers could write applications in Flash and then build them for use on the iPhone OS.
This wasn't just a feature in Flash CS5, this was the feature--Adobe's foot in the door to enable its wide stable of customers to create content on an extremely successful platform. It would have helped turn Flash into a cross-platform development environment for iPhone software and other platforms, assuming it's actually capable of producing apps that are as snappy and responsive as Xcode's.
But the new terms of 3.3.1 could have far-reaching complications. Extremely fine performance adjustments that can only be made in low-level assembly language appear to be off limits too. It also means that other languages like and are in jeopardy, and the future of look uncertain. (In a statement, Unity Technologies CEO David Helgason said the company has a great relationship with Apple and there was no indication that anything would change in their situation.)