Add Office Open XML as an acceptable file type :(

application/modules/courses/views/scripts/edit/index.phtml

@@ -1057,7 +1057,7 @@ if (in_array($this->request->getType(), array('NewCourseWithACE', 'AddACEToCours
             <li><a href="http://en.wikipedia.org/wiki/Portable_document_format" target="_new">Portable Document Format (.pdf)</a></li>
             <li><a href="http://en.wikipedia.org/wiki/Open_document_format" target="_new">OpenDocument Text (.odt)</a><li>
             <li><a href="http://en.wikipedia.org/wiki/DOC_(computing)" target="_new">MS Word Documents (.doc)</a></li>
-            <li><a href="http://en.wikipedia.org/wiki/Office_Open_XML" target="_new">Office Open XML (.doc)</a></li>
+            <li><a href="http://en.wikipedia.org/wiki/Office_Open_XML" target="_new">Office Open XML (.docx)</a></li>
         </ul>
     </div>