Apple has just released a statement today postponing the planned “spring” release of Leopard until October. Apple blames the engineering drain the iPhone project has caused for them internally. Many developers with early access to Leopard are not surprised by this announcement, as the recent seeds have still looked far from ready for production, but it is an unusual move by a company that nearly always makes its stated due dates.

From the release:

iPhone has already passed several of its required certification tests and is on schedule to ship in late June as planned. We can’t wait until customers get their hands (and fingers) on it and experience what a revolutionary and magical product it is. However, iPhone contains the most sophisticated software ever shipped on a mobile device, and finishing it on time has not come without a price — we had to borrow some key software engineering and QA resources from our Mac OS® X team, and as a result we will not be able to release Leopard at our Worldwide Developers Conference in early June as planned.