CSS styling - right side of the page spilling over far to the right on wide screens

[RuneHaven]

I have an HTML page. On my 15 inch laptop screen, it looks ok. But people with a wider screen have reported that the text on the right side of the screen is spilling far to the right.If I place the view-source HTML, it will be very long. So I am posting the link to the page. Please do not consider this as me advertising the site (If people complain, I will replace the link with the html).I am suspecting I need to wrap something in some div, but not certain. I am looking at it with firebug, and it seems that the issue is happening right after the Google ad, but I am not certain.Advice for how to fix the right-spill are much appreciated.The site is problemio.comThanks,Alex