The Register reports that Apple inadvertently revealed its hand last night, posting - albeit briefly - specifications for upcoming Power Macs on its online AppleStore. The new desktops will indeed be branded 'G5'. A graphic on the Power Mac G4 page detailing that computer's current spec. was swapped with the equivalent image. The image was presumably being prepared for Monday, when CEO Steve Jobs is expected to announce new machines at the company's annual Worldwide Developers Conference. The mistake was soon spotted and the original re-instated, but not before it had been seen by numerous Mac fans, at least one of whom managed to take a screenshot, posted on MacMinute.