As MacFixIt reader Ryan points out, the DisneyWorld.com was revamped recently, and the design changes include an unwelcome message for Safari users.
Attempting to access DisneyWorld.com with the latest version of Apple's browser you are rerouted to a "Browser Upgrade" page. Oddly, among the list of "upgraded browsers" that are supposedly compatible with the site is Safari.
Ryan writes "Using Internet Explorer or Netscape only fared slightly better. You can get to the site, but you cannot view the high bandwidth site, with extra animation and media. I was told that I needed to install the Flash plug-in, even though I have it installed on all three browsers."