The iPhone is still on schedule to ship "in late June," but Apple claims that the complexity of the device's built-in software has required it to borrow developers from the MacOS X development team in order to get things done in time. As a result, Apple says the release of MacOS X 10.5, a.k.a. "Leopard," has been pushed back until October. The company does plan to give developers beta Leopard CDs at the Worldwide Developers Conference in early June, though. Leopard is expected to include full 64-bit support, a built-in version of Apple's Windows dual-booting software Boot Camp, a system backup feature dubbed "Time Machine," and a virtual desktops system called "Spaces."