I think that's a different issue. If people don't know they need to scroll (your false floor example), that's a failing of the visual language, so it's entirely appropriate to put an explicit message "you can scroll" to make up for the failure of visual language.
I'm talking about what happens when you actually do scroll. In my experience those seem to the same sites that are visually confusing are the ones that re-program your scroll down as a page-down...
I'm talking about what happens when you actually do scroll. In my experience those seem to the same sites that are visually confusing are the ones that re-program your scroll down as a page-down...