I use the WP Subdomains plugin to make it so that my sports posts are hosted at sports.morganwick.com instead of morganwick.com/category/sports or morganwick.com/sports.
When I install No Category Base, when I attempt to go to the "football" subcategory of "sports" it tries to take me to morganwick.com/sports/football instead of sports.morganwick.com/football. The former URL is completely broken.