At its Worldwide Developers Conference, Apple has taken a rather large shot at Microsoft’s Longhorn, the next major release of Windows. In its boldest move to date, Apple is displaying several banners for Mac OS X 10.4 “Tiger” at the Moscone Center in San Francisco that make it quite clear the company’s feelings toward Microsoft and the software giant’s upcoming operating system. The banners, which are the first known items that show the new Tiger graphics, read: “Introducing Longhorn.” “Redmond, start your photocopiers.” “This should keep Redmond busy.” and “Redmond, we have a problem.” [Photos provided to MacMinute]