Phew, that's better. I finally got rid of the extra margin around this box that was showing up on browsers other than IE6. After much frustration, I realized it was due to the wrong type of comment delimeter in my CSS (the ol' <!-- --> instead of /* */ problem). Duh.
Now, if someone can tell me how to get the left margin to go all the way to the bottom of the page (so it's yellow instead of the background pattern all the way down), I'll, uh, that'd be super.