Comment 2 for bug 435346

This is something I consistently see in Epiphany (which has slightly different default font sizes, because it reads them from the system), both in gecko and webkit variant, when I reduce the font size. I believe it to be a problem with YUI3 grid system, but haven't looked too closely into it.

We can probably stop this from occuring by using <div style="clear:both"></div> after the header.

Note that the sidebar ends up below the entire main content, at least for me. Screenshot attached to illustrate that as well (haven't seen it in Tom's screenshot).