It's getting ugly again... Apple's Worldwide Developers Conference in San Francisco today will see the company declare: "Hasta la vista, Vista," to Microsoft's new operating system, reports claim.

Pre-WWDC show speculation is climbing in intensity. Images published over the weekend purport to show what Apple has had printed on banners which will be on view across the show venue, the Moscone Center.

These images clearly show Apple taking the fight to Microsoft, declaring variously: "Mac OS X Leopard: Introducing Vista 2.0", "You've come to the right platform", "Redmond has a cat problem" and "Hasta la vista, Vista".