Main content area disappears below navigation block when the browser viewport is less than 1035 pixels wide.
*This won't even fit on a 1024 display since a 1024 display has only 1150 pixels width available or less depending on browser, OS and OS theme. Tested on WinXP SP2 with Firefox 2.0 and IE6 sp1.

I was able to fix the issue to a degree by setting a minimum width on the "Wrap" selector (1000px). This stopped the "main" content block from disappearing to the bottom. But that excludes anyone on normal displays.
- Ideally a liquid 2 column display should work at any display setting.
- Not clear why the main area has a fixed width but the layout is flexible.

I love the theme, clean simple and fast but the Layout assumes a display size of 1280px (Windows) wide or wider.