Floating containers are being used on the FreeBSD homepage.
There need to be made some provision that text wraps around them.
They overlap/obscure other elements like download links.
Please see the Forums for detailed bug description and some analysis.
I have provided XHTML markup in the aforementioned thread that prevent the New To FreeBSD? button from overlapping the production download links:
I demonstrate it with screenshots of it in action and supply the markup used as a fix. All that is really needed is to use the XHTML width factor with the existing freebsd.org CSS code.
I also provide alternative CSS code for buttons that adjust in height and width to scale down in proportion as the screen size shrinks, and the XHTML to get the site to scale down correctly.