If you’re using an older browser, the sidebar may, in some instances, get pushed all the way to the bottom of the page.
I could fix this if I really wanted, but it doesn’t show up in the later browser versions, and I’m not that bored yet.
It occurs when I post a long, continous thing, like a long link, or one really long word. It stretches the post out past where the sidebar should be and shunts the sidebar to the bottom.
So get a newer browser if that’s happening to you. 🙂