Some users might navigate your site in odd ways, and you should anticipate this.
For example, instead of using the breadcrumb links on the page, a user might drop off a part of the URL in the hopes of finding more general content.
He or she might be visiting http://www.brandonsbaseballcards.com/news/2008/upcoming-baseball-card-shows.htm, but then enter http://www.brandonsbaseballcards.com/news/2008/ into the browser's address bar, believing that this will show all news from 2008.
Is your site prepared to show content in this situation or will it give the user a 404 ("page not found" error)?
What about moving up a directory level to http://www.brandonsbaseballcards.com/news/?