why does changing the font of a textarea force this button down?

Just curious as to why this bit of css

select开发者_JAVA百科, input, textarea, button
{
    font:99% sans-serif;
}

forces the 'submit' button below the textarea and off to the bottom lefthand side on this page.

The textarea is too large and it's pushing it back up.

I'd recomment resizing the width of the text area and adding float:right to the textarea, float:left to the button and overflow:hidden to the <section id="content">