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.

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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">