I'm viewing it in Firefox, and the content area at the top is blank, while the sidebars ("What's this" etc.) appear. The content area (Command-line-fu alpha) appears all the way at the bottom, once all the sidebars finish.
happened to me too until I made the window bigger, You need to wrap the two columns in a div that has min-width set or whatever the that property is called...
Is happening to me too (Firefox 3.05 on Ubuntu 8.10). Unfortunately, I'm on a very old laptop and can't go past 1024x768.