Page wrap?

[Wow]

I like the site. One of the features I like the best is how the pages go back to their normal width after someone has posted code (or an unbroken string of letters like a url) that kept the page from wrapping. When someone posts code or a long url that keeps the page from wrapping on my vB all the subsequent posts are also wide and hard to read because of the need to scroll back and forth. Is this a hack or is there another way to get the pages to go back to their normal width?