Georgetown Application Question??

<p>So I am trying to submit my application, everything is complete
But it says it won't allow me because "Your text contains invalid characters that have been marked with <em>?</em> as a placesaver. Please backspace over any occurences of <em>?</em> in the text box and type alternative characters."
So I can't use question marks in my essay? Does anyone else have this problem? What do I do?
Please help!!</p>