For those of you who took a look at my recent ParisWeb2007 slides, there's a rather long delay between your answer to the question "this document seems to be a slideshow, do you want to enter slidehow mode ?" and the moment the slideshow is ready. This is because it takes a lot of time to create the thumbnails when slides have an SVG-based gradient background. So I'm adding an info message to let the user know Fullescreen is not frozen. Next public version will have it.