Wordpress has placed an uncalled for character on one of our page's text. We have a few hundred pages, and this only occurs on one. In the paragraph's text, between the words 'Music' and 'Students', WordPress has placed a [X] character. It is not in the visual or text views, and only appears on the actual page. It cannot be copied nor is there an extra space in the code. In essence there is no extra character between the two words, aside from the space.
What caused this and how can it be removed?
If permissable, I can provide the URL containing the error.