During the Pleasantville basketball game:

If "outside of Pleasantville" doesn't exist, who does the basketball team play? Although the IMDb treats this as "incorrectly regarded" because it is 'consistent' with it being a TV show, this is still a large mistake. Other shows are certainly mindful of the world around them; Pleasantville should be no different. After all, they know they're a part of the United States, so they would know about Washington DC. This really doesn't wash.