Before you jump all over Wikipedia you may want to take a look at this article and a slew of others
http://www.journalism.co.uk/2/articles/51643.php
To sum it up for those too lazy to click and read, Encyclopedia Brittanica has approximately the same error rate as Wikipedia. So if you are going to start bashing Wikipedia for inconsistencies, you might as well string up Brittanica right next to it.